20472544896 has 128 divisors (see below), whose sum is σ = 57318451200. Its totient is φ = 6464360448.

The previous prime is 20472544871. The next prime is 20472544903. The reversal of 20472544896 is 69844527402.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572865 + ... + 607551.

It is an arithmetic number, because the mean of its divisors is an integer number (447800400).

Almost surely, 2^20472544896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20472544896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28659225600).

20472544896 is an abundant number, since it is smaller than the sum of its proper divisors (36845906304).

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

20472544896 is a wasteful number, since it uses less digits than its factorization.

20472544896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34786 (or 34774 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 20472544896 in words is "twenty billion, four hundred seventy-two million, five hundred forty-four thousand, eight hundred ninety-six".