20556002607700 has 108 divisors (see below), whose sum is σ = 52019931982620. Its totient is φ = 7030019082240.

The previous prime is 20556002607697. The next prime is 20556002607731. The reversal of 20556002607700 is 770620065502.

It can be written as a sum of positive squares in 6 ways, for example, as 895924624 + 20555106683076 = 29932^2 + 4533774^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3338205 + ... + 7228804.

Almost surely, 2^{20556002607700} is an apocalyptic number.

20556002607700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20556002607700 is an abundant number, since it is smaller than the sum of its proper divisors (31463929374920).

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

20556002607700 is a wasteful number, since it uses less digits than its factorization.

20556002607700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10567434 (or 10567420 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 20556002607700 in words is "twenty trillion, five hundred fifty-six billion, two million, six hundred seven thousand, seven hundred".