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20030331230 = 2572132241883
BaseRepresentation
bin10010101001111001…
…101001100101011110
31220200221121020212122
4102221321221211132
5312010231044410
613111331302542
71306241002100
oct225171514536
956627536778
1020030331230
118549666358
123a7014aa52
131b72a67600
14d8033d570
157c375ce55
hex4a9e6995e

20030331230 has 72 divisors (see below), whose sum is σ = 45415656072. Its totient is φ = 6339243456.

The previous prime is 20030331229. The next prime is 20030331257. The reversal of 20030331230 is 3213303002.

It is a junction number, because it is equal to n+sod(n) for n = 20030331199 and 20030331208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38132 + ... + 203751.

It is an arithmetic number, because the mean of its divisors is an integer number (630773001).

Almost surely, 220030331230 is an apocalyptic number.

20030331230 is an abundant number, since it is smaller than the sum of its proper divisors (25385324842).

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

20030331230 is a wasteful number, since it uses less digits than its factorization.

20030331230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241930 (or 241910 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 20030331230 its reverse (3213303002), we get a palindrome (23243634232).

The spelling of 20030331230 in words is "twenty billion, thirty million, three hundred thirty-one thousand, two hundred thirty".

Divisors: 1 2 5 7 10 13 14 26 35 49 65 70 91 98 130 169 182 245 338 455 490 637 845 910 1183 1274 1690 2366 3185 5915 6370 8281 11830 16562 41405 82810 241883 483766 1209415 1693181 2418830 3144479 3386362 6288958 8465905 11852267 15722395 16931810 22011353 23704534 31444790 40878227 44022706 59261335 81756454 110056765 118522670 154079471 204391135 220113530 286147589 308158942 408782270 572295178 770397355 1430737945 1540794710 2003033123 2861475890 4006066246 10015165615 20030331230