18713928 has 16 divisors (see below), whose sum is σ = 46784880. Its totient is φ = 6237968.

The previous prime is 18713921. The next prime is 18713951. The reversal of 18713928 is 82931781.

It is a super-2 number, since 2×18713928² = 700422202378368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18713921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389850 + ... + 389897.

It is an arithmetic number, because the mean of its divisors is an integer number (2924055).

Almost surely, 2^18713928 is an apocalyptic number.

It is an amenable number.

18713928 is an abundant number, since it is smaller than the sum of its proper divisors (28070952).

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

18713928 is a wasteful number, since it uses less digits than its factorization.

18713928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779756 (or 779752 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 18713928 is about 4325.9597778990. The cubic root of 18713928 is about 265.4941675050.

The spelling of 18713928 in words is "eighteen million, seven hundred thirteen thousand, nine hundred twenty-eight".