20556544652 has 24 divisors (see below), whose sum is σ = 41118868224. Its totient is φ = 8808709392.

The previous prime is 20556544639. The next prime is 20556544681. The reversal of 20556544652 is 25644565502.

It is a super-2 number, since 2×20556544652² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 167483 + ... + 262989.

It is an arithmetic number, because the mean of its divisors is an integer number (1713286176).

Almost surely, 2^20556544652 is an apocalyptic number.

It is an amenable number.

20556544652 is an abundant number, since it is smaller than the sum of its proper divisors (20562323572).

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

20556544652 is a wasteful number, since it uses less digits than its factorization.

20556544652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103205 (or 103203 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 44.

The spelling of 20556544652 in words is "twenty billion, five hundred fifty-six million, five hundred forty-four thousand, six hundred fifty-two".