20644677004 has 24 divisors (see below), whose sum is σ = 41293431200. Its totient is φ = 8846845056.

The previous prime is 20644676929. The next prime is 20644677023. The reversal of 20644677004 is 40077644602.

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, 310072 + ... + 370720.

Almost surely, 2^20644677004 is an apocalyptic number.

It is an amenable number.

20644677004 is an abundant number, since it is smaller than the sum of its proper divisors (20648754196).

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

20644677004 is a wasteful number, since it uses less digits than its factorization.

20644677004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72817 (or 72815 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 40.

The spelling of 20644677004 in words is "twenty billion, six hundred forty-four million, six hundred seventy-seven thousand, four".