20860756544 has 28 divisors (see below), whose sum is σ = 41805433788. Its totient is φ = 10327104000.

The previous prime is 20860756541. The next prime is 20860756549. The reversal of 20860756544 is 44565706802.

It can be written as a sum of positive squares in 2 ways, for example, as 9085902400 + 11774854144 = 95320^2 + 108512^2 .

It is not an unprimeable number, because it can be changed into a prime (20860756541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1607147 + ... + 1620074.

Almost surely, 2^20860756544 is an apocalyptic number.

It is an amenable number.

20860756544 is an abundant number, since it is smaller than the sum of its proper divisors (20944677244).

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

20860756544 is a wasteful number, since it uses less digits than its factorization.

20860756544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227334 (or 3227324 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 20860756544 in words is "twenty billion, eight hundred sixty million, seven hundred fifty-six thousand, five hundred forty-four".