20656369624 has 64 divisors (see below), whose sum is σ = 43646330880. Its totient is φ = 9079776000.

The previous prime is 20656369579. The next prime is 20656369633. The reversal of 20656369624 is 42696365602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7399669 + ... + 7402459.

It is an arithmetic number, because the mean of its divisors is an integer number (681973920).

Almost surely, 2^20656369624 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 20656369624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21823165440).

20656369624 is an abundant number, since it is smaller than the sum of its proper divisors (22989961256).

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

20656369624 is a wasteful number, since it uses less digits than its factorization.

20656369624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552 (or 5548 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 20656369624 in words is "twenty billion, six hundred fifty-six million, three hundred sixty-nine thousand, six hundred twenty-four".