20656535592 has 128 divisors (see below), whose sum is σ = 64435875840. Its totient is φ = 5361012480.

The previous prime is 20656535573. The next prime is 20656535651. The reversal of 20656535592 is 29553565602.

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 31 ways as a sum of consecutive naturals, for example, 2744218 + ... + 2751734.

It is an arithmetic number, because the mean of its divisors is an integer number (503405280).

Almost surely, 2^20656535592 is an apocalyptic number.

20656535592 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20656535592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32217937920).

20656535592 is an abundant number, since it is smaller than the sum of its proper divisors (43779340248).

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

20656535592 is a wasteful number, since it uses less digits than its factorization.

20656535592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9031 (or 9027 counting only the distinct ones).

The product of its (nonzero) digits is 2430000, while the sum is 48.

The spelling of 20656535592 in words is "twenty billion, six hundred fifty-six million, five hundred thirty-five thousand, five hundred ninety-two".