18488964 has 48 divisors (see below), whose sum is σ = 48488832. Its totient is φ = 5440512.

The previous prime is 18488933. The next prime is 18488971. The reversal of 18488964 is 46988481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012 + ... + 6164.

It is an arithmetic number, because the mean of its divisors is an integer number (1010184).

Almost surely, 2^18488964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18488964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24244416).

18488964 is an abundant number, since it is smaller than the sum of its proper divisors (29999868).

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

18488964 is a wasteful number, since it uses less digits than its factorization.

18488964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5196 (or 5194 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 18488964 is about 4299.8795331962. The cubic root of 18488964 is about 264.4260224334.

The spelling of 18488964 in words is "eighteen million, four hundred eighty-eight thousand, nine hundred sixty-four".