18323924 has 6 divisors (see below), whose sum is σ = 32066874. Its totient is φ = 9161960.

The previous prime is 18323867. The next prime is 18323933. The reversal of 18323924 is 42932381.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17808400 + 515524 = 4220^2 + 718^2 .

It is a super-4 number, since 4×18323924⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2290487 + ... + 2290494.

It is an arithmetic number, because the mean of its divisors is an integer number (5344479).

Almost surely, 2^18323924 is an apocalyptic number.

It is an amenable number.

18323924 is a deficient number, since it is larger than the sum of its proper divisors (13742950).

18323924 is a wasteful number, since it uses less digits than its factorization.

18323924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580985 (or 4580983 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 18323924 is about 4280.6452784598. The cubic root of 18323924 is about 263.6368783329.

The spelling of 18323924 in words is "eighteen million, three hundred twenty-three thousand, nine hundred twenty-four".