18944432 has 20 divisors (see below), whose sum is σ = 39528720. Its totient is φ = 8743488.

The previous prime is 18944417. The next prime is 18944447. The reversal of 18944432 is 23444981.

It is an interprime number because it is at equal distance from previous prime (18944417) and next prime (18944447).

It is a junction number, because it is equal to n+sod(n) for n = 18944392 and 18944401.

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, 45332 + ... + 45747.

It is an arithmetic number, because the mean of its divisors is an integer number (1976436).

Almost surely, 2^18944432 is an apocalyptic number.

It is an amenable number.

18944432 is an abundant number, since it is smaller than the sum of its proper divisors (20584288).

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

18944432 is a wasteful number, since it uses less digits than its factorization.

18944432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91100 (or 91094 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 18944432 is about 4352.5201894994. The cubic root of 18944432 is about 266.5797744674.

The spelling of 18944432 in words is "eighteen million, nine hundred forty-four thousand, four hundred thirty-two".