18488532416 has 28 divisors (see below), whose sum is σ = 36715077192. Its totient is φ = 9237489408.

The previous prime is 18488532397. The next prime is 18488532431. The reversal of 18488532416 is 61423588481.

It is a congruent number.

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, 17330 + ... + 193073.

Almost surely, 2^18488532416 is an apocalyptic number.

18488532416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18488532416 is a deficient number, since it is larger than the sum of its proper divisors (18226544776).

18488532416 is a wasteful number, since it uses less digits than its factorization.

18488532416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211788 (or 211778 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 50.

The spelling of 18488532416 in words is "eighteen billion, four hundred eighty-eight million, five hundred thirty-two thousand, four hundred sixteen".