18394504 has 8 divisors (see below), whose sum is σ = 34489710. Its totient is φ = 9197248.

The previous prime is 18394499. The next prime is 18394507. The reversal of 18394504 is 40549381.

It can be written as a sum of positive squares in only one way, i.e., 18232900 + 161604 = 4270^2 + 402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18394504.

It is not an unprimeable number, because it can be changed into a prime (18394507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1149649 + ... + 1149664.

Almost surely, 2^18394504 is an apocalyptic number.

It is an amenable number.

18394504 is a deficient number, since it is larger than the sum of its proper divisors (16095206).

18394504 is a wasteful number, since it uses less digits than its factorization.

18394504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299319 (or 2299315 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18394504 is about 4288.8814392566. The cubic root of 18394504 is about 263.9749364023.

The spelling of 18394504 in words is "eighteen million, three hundred ninety-four thousand, five hundred four".