18029664 has 36 divisors (see below), whose sum is σ = 51272676. Its totient is φ = 6009792.

The previous prime is 18029663. The next prime is 18029719. The reversal of 18029664 is 46692081.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18029663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31014 + ... + 31589.

It is an arithmetic number, because the mean of its divisors is an integer number (1424241).

Almost surely, 2^18029664 is an apocalyptic number.

It is an amenable number.

18029664 is an abundant number, since it is smaller than the sum of its proper divisors (33243012).

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

18029664 is a wasteful number, since it uses less digits than its factorization.

18029664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62619 (or 62608 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 18029664 is about 4246.1351839055. The cubic root of 18029664 is about 262.2180264684.

The spelling of 18029664 in words is "eighteen million, twenty-nine thousand, six hundred sixty-four".