Search a number
-
+
20102111216 = 241179218301
BaseRepresentation
bin10010101110001011…
…011101111111110000
31220212221200001111122
4102232023131333300
5312132120024331
613122414001412
71311102061145
oct225613357760
956787601448
1020102111216
118586132760
123a901a6268
131b848aa385
14d89aa63cc
157c9bdb17b
hex4ae2ddff0

20102111216 has 60 divisors (see below), whose sum is σ = 43035542424. Its totient is φ = 9021168000.

The previous prime is 20102111189. The next prime is 20102111257. The reversal of 20102111216 is 61211120102.

It is a junction number, because it is equal to n+sod(n) for n = 20102111194 and 20102111203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089266 + ... + 1107566.

Almost surely, 220102111216 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 20102111216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21517771212).

20102111216 is an abundant number, since it is smaller than the sum of its proper divisors (22933431208).

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

20102111216 is a wasteful number, since it uses less digits than its factorization.

20102111216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18478 (or 18393 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20102111216 its reverse (61211120102), we get a palindrome (81313231318).

The spelling of 20102111216 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two hundred sixteen".

Divisors: 1 2 4 8 11 16 22 44 79 88 158 176 316 632 869 1264 1738 3476 6241 6952 12482 13904 18301 24964 36602 49928 68651 73204 99856 137302 146408 201311 274604 292816 402622 549208 805244 1098416 1445779 1610488 2891558 3220976 5783116 11566232 15903569 23132464 31807138 63614276 114216541 127228552 228433082 254457104 456866164 913732328 1256381951 1827464656 2512763902 5025527804 10051055608 20102111216