18124720 has 40 divisors (see below), whose sum is σ = 44622144. Its totient is φ = 6822912.

The previous prime is 18124699. The next prime is 18124763. The reversal of 18124720 is 2742181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5304 + ... + 8023.

Almost surely, 2^18124720 is an apocalyptic number.

18124720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18124720 is an abundant number, since it is smaller than the sum of its proper divisors (26497424).

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

18124720 is a wasteful number, since it uses less digits than its factorization.

18124720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357 (or 13351 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18124720 is about 4257.3137070223. The cubic root of 18124720 is about 262.6780409698.

The spelling of 18124720 in words is "eighteen million, one hundred twenty-four thousand, seven hundred twenty".