18604812 has 12 divisors (see below), whose sum is σ = 43411256. Its totient is φ = 6201600.

The previous prime is 18604811. The next prime is 18604829. The reversal of 18604812 is 21840681.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×18604812² = 692278059110688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18604812.

It is not an unprimeable number, because it can be changed into a prime (18604811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775189 + ... + 775212.

Almost surely, 2^18604812 is an apocalyptic number.

18604812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18604812 is an abundant number, since it is smaller than the sum of its proper divisors (24806444).

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

18604812 is a wasteful number, since it uses less digits than its factorization.

18604812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550408 (or 1550406 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18604812 is about 4313.3295723837. The cubic root of 18604812 is about 264.9771524149.

The spelling of 18604812 in words is "eighteen million, six hundred four thousand, eight hundred twelve".