20404244672 has 56 divisors (see below), whose sum is σ = 46311068160. Its totient is φ = 8737655040.

The previous prime is 20404244657. The next prime is 20404244687. The reversal of 20404244672 is 27644240402.

It is an interprime number because it is at equal distance from previous prime (20404244657) and next prime (20404244687).

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560729 + ... + 596007.

It is an arithmetic number, because the mean of its divisors is an integer number (826983360).

Almost surely, 2^20404244672 is an apocalyptic number.

It is an amenable number.

20404244672 is an abundant number, since it is smaller than the sum of its proper divisors (25906823488).

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

20404244672 is a wasteful number, since it uses less digits than its factorization.

20404244672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36589 (or 36579 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 35.

The spelling of 20404244672 in words is "twenty billion, four hundred four million, two hundred forty-four thousand, six hundred seventy-two".