20544538256 has 40 divisors (see below), whose sum is σ = 43690147104. Its totient is φ = 9281122560.

The previous prime is 20544538219. The next prime is 20544538277. The reversal of 20544538256 is 65283544502.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329381 + ... + 386756.

Almost surely, 2^20544538256 is an apocalyptic number.

It is an amenable number.

20544538256 is an abundant number, since it is smaller than the sum of its proper divisors (23145608848).

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

20544538256 is a wasteful number, since it uses less digits than its factorization.

20544538256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716319 (or 716313 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 20544538256 in words is "twenty billion, five hundred forty-four million, five hundred thirty-eight thousand, two hundred fifty-six".