20756605700 has 18 divisors (see below), whose sum is σ = 45041834586. Its totient is φ = 8302642240.

The previous prime is 20756605673. The next prime is 20756605703. The reversal of 20756605700 is 750665702.

It can be written as a sum of positive squares in 3 ways, for example, as 1330936324 + 19425669376 = 36482^2 + 139376^2 .

It is not an unprimeable number, because it can be changed into a prime (20756605703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103782929 + ... + 103783128.

Almost surely, 2^20756605700 is an apocalyptic number.

20756605700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20756605700 is an abundant number, since it is smaller than the sum of its proper divisors (24285228886).

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

20756605700 is a wasteful number, since it uses less digits than its factorization.

20756605700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207566071 (or 207566064 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 20756605700 in words is "twenty billion, seven hundred fifty-six million, six hundred five thousand, seven hundred".