20044488978 has 12 divisors (see below), whose sum is σ = 43429726158. Its totient is φ = 6681496320.

The previous prime is 20044488949. The next prime is 20044489007. The reversal of 20044488978 is 87988444002.

It is an interprime number because it is at equal distance from previous prime (20044488949) and next prime (20044489007).

It can be written as a sum of positive squares in only one way, i.e., 19890307089 + 154181889 = 141033^2 + 12417^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556791343 + ... + 556791378.

Almost surely, 2^20044488978 is an apocalyptic number.

20044488978 is an abundant number, since it is smaller than the sum of its proper divisors (23385237180).

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

20044488978 is a wasteful number, since it uses less digits than its factorization.

20044488978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113582729 (or 1113582726 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 20044488978 in words is "twenty billion, forty-four million, four hundred eighty-eight thousand, nine hundred seventy-eight".