18716432 has 30 divisors (see below), whose sum is σ = 42185358. Its totient is φ = 8020992.

The previous prime is 18716431. The next prime is 18716471. The reversal of 18716432 is 23461781.

It can be written as a sum of positive squares in only one way, i.e., 12645136 + 6071296 = 3556^2 + 2464^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18716431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11153 + ... + 12720.

Almost surely, 2^18716432 is an apocalyptic number.

It is an amenable number.

18716432 is an abundant number, since it is smaller than the sum of its proper divisors (23468926).

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

18716432 is a wasteful number, since it uses less digits than its factorization.

18716432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23895 (or 23882 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 18716432 is about 4326.2491837618. The cubic root of 18716432 is about 265.5060083782.

The spelling of 18716432 in words is "eighteen million, seven hundred sixteen thousand, four hundred thirty-two".