18660964 has 36 divisors (see below), whose sum is σ = 39995760. Its totient is φ = 7575120.

The previous prime is 18660959. The next prime is 18661009. The reversal of 18660964 is 46906681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1219 + ... + 6229.

Almost surely, 2^18660964 is an apocalyptic number.

18660964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18660964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19997880).

18660964 is an abundant number, since it is smaller than the sum of its proper divisors (21334796).

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

18660964 is a wasteful number, since it uses less digits than its factorization.

18660964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048 (or 5039 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 18660964 is about 4319.8337930990. The cubic root of 18660964 is about 265.2434643978.

The spelling of 18660964 in words is "eighteen million, six hundred sixty thousand, nine hundred sixty-four".