18724812 has 48 divisors (see below), whose sum is σ = 45313632. Its totient is φ = 6013440.

The previous prime is 18724801. The next prime is 18724813. The reversal of 18724812 is 21842781.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18724813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80248 + ... + 80480.

It is an arithmetic number, because the mean of its divisors is an integer number (944034).

Almost surely, 2^18724812 is an apocalyptic number.

18724812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18724812 is an abundant number, since it is smaller than the sum of its proper divisors (26588820).

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

18724812 is a wasteful number, since it uses less digits than its factorization.

18724812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 456 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 18724812 is about 4327.2175817724. The cubic root of 18724812 is about 265.5456279020.

The spelling of 18724812 in words is "eighteen million, seven hundred twenty-four thousand, eight hundred twelve".