18324872 has 8 divisors (see below), whose sum is σ = 34359150. Its totient is φ = 9162432.

The previous prime is 18324863. The next prime is 18324881. The reversal of 18324872 is 27842381.

It is an interprime number because it is at equal distance from previous prime (18324863) and next prime (18324881).

It can be written as a sum of positive squares in only one way, i.e., 17255716 + 1069156 = 4154^2 + 1034^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145297 + ... + 1145312.

Almost surely, 2^18324872 is an apocalyptic number.

It is an amenable number.

18324872 is a deficient number, since it is larger than the sum of its proper divisors (16034278).

18324872 is a wasteful number, since it uses less digits than its factorization.

18324872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290615 (or 2290611 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 18324872 is about 4280.7560079967. The cubic root of 18324872 is about 263.6414247290.

The spelling of 18324872 in words is "eighteen million, three hundred twenty-four thousand, eight hundred seventy-two".