18569440944 has 80 divisors (see below), whose sum is σ = 55020605440. Its totient is φ = 5990137920.

The previous prime is 18569440927. The next prime is 18569440973. The reversal of 18569440944 is 44904496581.

It is a super-2 number, since 2×18569440944² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 679912 + ... + 706695.

It is an arithmetic number, because the mean of its divisors is an integer number (687757568).

Almost surely, 2^18569440944 is an apocalyptic number.

It is an amenable number.

18569440944 is an abundant number, since it is smaller than the sum of its proper divisors (36451164496).

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

18569440944 is a wasteful number, since it uses less digits than its factorization.

18569440944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386655 (or 1386643 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 18569440944 in words is "eighteen billion, five hundred sixty-nine million, four hundred forty thousand, nine hundred forty-four".