20656150660 has 48 divisors (see below), whose sum is σ = 43574808816. Its totient is φ = 8225044992.

The previous prime is 20656150651. The next prime is 20656150693. The reversal of 20656150660 is 6605165602.

It can be written as a sum of positive squares in 8 ways, for example, as 10101054016 + 10555096644 = 100504^2 + 102738^2 .

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 15 ways as a sum of consecutive naturals, for example, 4570722 + ... + 4575238.

It is an arithmetic number, because the mean of its divisors is an integer number (907808517).

Almost surely, 2^20656150660 is an apocalyptic number.

20656150660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20656150660 is an abundant number, since it is smaller than the sum of its proper divisors (22918658156).

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

20656150660 is a wasteful number, since it uses less digits than its factorization.

20656150660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512 (or 5510 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 20656150660 in words is "twenty billion, six hundred fifty-six million, one hundred fifty thousand, six hundred sixty".