18500064 has 48 divisors (see below), whose sum is σ = 52980480. Its totient is φ = 5605760.

The previous prime is 18500051. The next prime is 18500071. The reversal of 18500064 is 46000581.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 7704 + ... + 9815.

It is an arithmetic number, because the mean of its divisors is an integer number (1103760).

Almost surely, 2^18500064 is an apocalyptic number.

It is an amenable number.

18500064 is an abundant number, since it is smaller than the sum of its proper divisors (34480416).

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

18500064 is a wasteful number, since it uses less digits than its factorization.

18500064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17543 (or 17535 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18500064 is about 4301.1700733638. The cubic root of 18500064 is about 264.4789286187.

The spelling of 18500064 in words is "eighteen million, five hundred thousand, sixty-four".