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21032310312 = 2334138273019
BaseRepresentation
bin10011100101100111…
…111001011000101000
32000021210000001210000
4103211213321120220
5321033232412222
613355003223000
71343125454646
oct234547713050
960253001700
1021032310312
118a13211042
1240ab817a60
131ca2518540
141037444196
158316d09ac
hex4e59f9628

21032310312 has 160 divisors (see below), whose sum is σ = 63539229600. Its totient is φ = 6461513856.

The previous prime is 21032310311. The next prime is 21032310331. The reversal of 21032310312 is 21301323012.

21032310312 is a `hidden beast` number, since 2 + 10 + 32 + 310 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21032310311) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6965139 + ... + 6968157.

It is an arithmetic number, because the mean of its divisors is an integer number (397120185).

Almost surely, 221032310312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21032310312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31769614800).

21032310312 is an abundant number, since it is smaller than the sum of its proper divisors (42506919288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21032310312 is a wasteful number, since it uses less digits than its factorization.

21032310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877 (or 3864 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21032310312 its reverse (21301323012), we get a palindrome (42333633324).

The spelling of 21032310312 in words is "twenty-one billion, thirty-two million, three hundred ten thousand, three hundred twelve".

Divisors: 1 2 3 4 6 8 9 12 13 18 24 26 27 36 39 52 54 72 78 81 104 108 117 156 162 216 234 312 324 351 468 648 702 827 936 1053 1404 1654 2106 2481 2808 3019 3308 4212 4962 6038 6616 7443 8424 9057 9924 10751 12076 14886 18114 19848 21502 22329 24152 27171 29772 32253 36228 39247 43004 44658 54342 59544 64506 66987 72456 78494 81513 86008 89316 96759 108684 117741 129012 133974 156988 163026 178632 193518 217368 235482 244539 258024 267948 290277 313976 326052 353223 387036 470964 489078 535896 580554 652104 706446 774072 870831 941928 978156 1059669 1161108 1412892 1741662 1956312 2119338 2322216 2496713 2825784 3179007 3483324 4238676 4993426 6358014 6966648 7490139 8477352 9986852 12716028 14980278 19973704 22470417 25432056 29960556 32457269 44940834 59921112 64914538 67411251 89881668 97371807 129829076 134822502 179763336 194743614 202233753 259658152 269645004 292115421 389487228 404467506 539290008 584230842 778974456 808935012 876346263 1168461684 1617870024 1752692526 2336923368 2629038789 3505385052 5258077578 7010770104 10516155156 21032310312