18885905476 has 9 divisors (see below), whose sum is σ = 33050815581. Its totient is φ = 9442815312.

The previous prime is 18885905453. The next prime is 18885905483. The reversal of 18885905476 is 67450958881.

The square root of 18885905476 is 137426.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7612562500 + 11273342976 = 87250^2 + 106176^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 240496 + ... + 309208.

Almost surely, 2^18885905476 is an apocalyptic number.

18885905476 is the 137426-th square number.

It is an amenable number.

18885905476 is a deficient number, since it is larger than the sum of its proper divisors (14164910105).

18885905476 is an frugal number, since it uses more digits than its factorization.

18885905476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137430 (or 68715 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 18885905476 in words is "eighteen billion, eight hundred eighty-five million, nine hundred five thousand, four hundred seventy-six".