18774912 has 64 divisors (see below), whose sum is σ = 53721360. Its totient is φ = 5775360.

The previous prime is 18774901. The next prime is 18774979. The reversal of 18774912 is 21947781.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3112 + ... + 6872.

Almost surely, 2^18774912 is an apocalyptic number.

18774912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18774912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26860680).

18774912 is an abundant number, since it is smaller than the sum of its proper divisors (34946448).

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

18774912 is a wasteful number, since it uses less digits than its factorization.

18774912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791 (or 3779 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The square root of 18774912 is about 4333.0026540495. The cubic root of 18774912 is about 265.7822477827.

The spelling of 18774912 in words is "eighteen million, seven hundred seventy-four thousand, nine hundred twelve".