18723696 has 20 divisors (see below), whose sum is σ = 48369672. Its totient is φ = 6241216.

The previous prime is 18723671. The next prime is 18723701. The reversal of 18723696 is 69632781.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

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 in 3 ways as a sum of consecutive naturals, for example, 194991 + ... + 195086.

Almost surely, 2^18723696 is an apocalyptic number.

18723696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18723696 is an abundant number, since it is smaller than the sum of its proper divisors (29645976).

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

18723696 is a wasteful number, since it uses less digits than its factorization.

18723696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390088 (or 390082 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 18723696 is about 4327.0886286278. The cubic root of 18723696 is about 265.5403522851.

The spelling of 18723696 in words is "eighteen million, seven hundred twenty-three thousand, six hundred ninety-six".