18723324 has 24 divisors (see below), whose sum is σ = 46258128. Its totient is φ = 5873920.

The previous prime is 18723323. The next prime is 18723329. The reversal of 18723324 is 42332781.

It is a junction number, because it is equal to n+sod(n) for n = 18723291 and 18723300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18723323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45687 + ... + 46094.

It is an arithmetic number, because the mean of its divisors is an integer number (1927422).

Almost surely, 2^18723324 is an apocalyptic number.

It is an amenable number.

18723324 is an abundant number, since it is smaller than the sum of its proper divisors (27534804).

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

18723324 is a wasteful number, since it uses less digits than its factorization.

18723324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91805 (or 91803 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 18723324 is about 4327.0456433923. The cubic root of 18723324 is about 265.5385936995.

The spelling of 18723324 in words is "eighteen million, seven hundred twenty-three thousand, three hundred twenty-four".