18774312 has 16 divisors (see below), whose sum is σ = 46935840. Its totient is φ = 6258096.

The previous prime is 18774311. The next prime is 18774319. The reversal of 18774312 is 21347781.

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 (18774311) 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, 391108 + ... + 391155.

It is an arithmetic number, because the mean of its divisors is an integer number (2933490).

Almost surely, 2^18774312 is an apocalyptic number.

18774312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18774312 is an abundant number, since it is smaller than the sum of its proper divisors (28161528).

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

18774312 is a wasteful number, since it uses less digits than its factorization.

18774312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782272 (or 782268 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 18774312 is about 4332.9334174437. The cubic root of 18774312 is about 265.7794165036.

The spelling of 18774312 in words is "eighteen million, seven hundred seventy-four thousand, three hundred twelve".