18964866 has 8 divisors (see below), whose sum is σ = 37929744. Its totient is φ = 6321620.

The previous prime is 18964859. The next prime is 18964873. The reversal of 18964866 is 66846981.

It is an interprime number because it is at equal distance from previous prime (18964859) and next prime (18964873).

It is a sphenic number, since it is the product of 3 distinct primes.

18964866 is an admirable number.

It is a super-2 number, since 2×18964866² = 719332284795912, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580400 + ... + 1580411.

It is an arithmetic number, because the mean of its divisors is an integer number (4741218).

Almost surely, 2^18964866 is an apocalyptic number.

18964866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18964866 is a wasteful number, since it uses less digits than its factorization.

18964866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160816.

The product of its digits is 497664, while the sum is 48.

The square root of 18964866 is about 4354.8669325250. The cubic root of 18964866 is about 266.6755868544.

The spelling of 18964866 in words is "eighteen million, nine hundred sixty-four thousand, eight hundred sixty-six".