18860664 has 16 divisors (see below), whose sum is σ = 47151720. Its totient is φ = 6286880.

The previous prime is 18860663. The next prime is 18860687. The reversal of 18860664 is 46606881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18860663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392907 + ... + 392954.

Almost surely, 2^18860664 is an apocalyptic number.

It is an amenable number.

18860664 is an abundant number, since it is smaller than the sum of its proper divisors (28291056).

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

18860664 is a wasteful number, since it uses less digits than its factorization.

18860664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785870 (or 785866 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 18860664 is about 4342.8865976445. The cubic root of 18860664 is about 266.1862753883.

The spelling of 18860664 in words is "eighteen million, eight hundred sixty thousand, six hundred sixty-four".