18989573404 has 48 divisors (see below), whose sum is σ = 35742873600. Its totient is φ = 8807601600.

The previous prime is 18989573387. The next prime is 18989573411. The reversal of 18989573404 is 40437598981.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

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, 480849 + ... + 518839.

It is an arithmetic number, because the mean of its divisors is an integer number (744643200).

Almost surely, 2^18989573404 is an apocalyptic number.

It is an amenable number.

18989573404 is a deficient number, since it is larger than the sum of its proper divisors (16753300196).

18989573404 is a wasteful number, since it uses less digits than its factorization.

18989573404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38194 (or 38192 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 18989573404 in words is "eighteen billion, nine hundred eighty-nine million, five hundred seventy-three thousand, four hundred four".