20988044488 has 16 divisors (see below), whose sum is σ = 40709569500. Its totient is φ = 10132159296.

The previous prime is 20988044477. The next prime is 20988044513. The reversal of 20988044488 is 88444088902.

It can be written as a sum of positive squares in 2 ways, for example, as 20978046244 + 9998244 = 144838^2 + 3162^2 .

It is a super-2 number, since 2×20988044488² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45232623 + ... + 45233086.

Almost surely, 2^20988044488 is an apocalyptic number.

It is an amenable number.

20988044488 is a deficient number, since it is larger than the sum of its proper divisors (19721525012).

20988044488 is a wasteful number, since it uses less digits than its factorization.

20988044488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90465744 (or 90465740 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 55.

The spelling of 20988044488 in words is "twenty billion, nine hundred eighty-eight million, forty-four thousand, four hundred eighty-eight".