18408064 has 16 divisors (see below), whose sum is σ = 36672570. Its totient is φ = 9203968.

The previous prime is 18408053. The next prime is 18408077. The reversal of 18408064 is 46080481.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 3968064 = 3800^2 + 1992^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71779 + ... + 72034.

Almost surely, 2^18408064 is an apocalyptic number.

It is an amenable number.

18408064 is a deficient number, since it is larger than the sum of its proper divisors (18264506).

18408064 is an equidigital number, since it uses as much as digits as its factorization.

18408064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143827 (or 143815 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 18408064 is about 4290.4619797873. The cubic root of 18408064 is about 264.0397858618.

The spelling of 18408064 in words is "eighteen million, four hundred eight thousand, sixty-four".