18404764 has 12 divisors (see below), whose sum is σ = 36809584. Its totient is φ = 7887744.

The previous prime is 18404753. The next prime is 18404767. The reversal of 18404764 is 46740481.

18404764 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18404767) 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, 328629 + ... + 328684.

Almost surely, 2^18404764 is an apocalyptic number.

18404764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18404764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18404764 is a wasteful number, since it uses less digits than its factorization.

18404764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657324 (or 657322 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 18404764 is about 4290.0773885794. The cubic root of 18404764 is about 264.0240068466.

The spelling of 18404764 in words is "eighteen million, four hundred four thousand, seven hundred sixty-four".