Search a number
-
+
20976631168 = 27831974457
BaseRepresentation
bin10011100010010011…
…011111110110000000
32000010220020021100111
4103202103133312000
5320430004144133
613345254001104
71341551265043
oct234223376600
960126207314
1020976631168
118994841519
124095046194
131c93b221bc
14102dcacc5a
1582b8831cd
hex4e24dfd80

20976631168 has 32 divisors (see below), whose sum is σ = 42292890360. Its totient is φ = 10361945088.

The previous prime is 20976631157. The next prime is 20976631229. The reversal of 20976631168 is 86113667902.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976605 + ... + 997852.

Almost surely, 220976631168 is an apocalyptic number.

It is an amenable number.

20976631168 is an abundant number, since it is smaller than the sum of its proper divisors (21316259192).

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

20976631168 is an equidigital number, since it uses as much as digits as its factorization.

20976631168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974554 (or 1974542 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 20976631168 in words is "twenty billion, nine hundred seventy-six million, six hundred thirty-one thousand, one hundred sixty-eight".

Divisors: 1 2 4 8 16 32 64 83 128 166 332 664 1328 2656 5312 10624 1974457 3948914 7897828 15795656 31591312 63182624 126365248 163879931 252730496 327759862 655519724 1311039448 2622078896 5244157792 10488315584 20976631168