18904427552 has 24 divisors (see below), whose sum is σ = 37221683436. Its totient is φ = 9451301632.

The previous prime is 18904427539. The next prime is 18904427623. The reversal of 18904427552 is 25572440981.

It can be written as a sum of positive squares in 2 ways, for example, as 18518855056 + 385572496 = 136084^2 + 19636^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18904427497 and 18904427506.

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, 413918 + ... + 457314.

Almost surely, 2^18904427552 is an apocalyptic number.

It is an amenable number.

18904427552 is a deficient number, since it is larger than the sum of its proper divisors (18317255884).

18904427552 is a wasteful number, since it uses less digits than its factorization.

18904427552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57020 (or 57012 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 18904427552 in words is "eighteen billion, nine hundred four million, four hundred twenty-seven thousand, five hundred fifty-two".