18666712 has 16 divisors (see below), whose sum is σ = 36129600. Its totient is φ = 9032160.

The previous prime is 18666709. The next prime is 18666733. The reversal of 18666712 is 21766681.

It is a super-2 number, since 2×18666712² = 696892273781888, which contains 22 as substring.

It is a congruent 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, 37387 + ... + 37882.

It is an arithmetic number, because the mean of its divisors is an integer number (2258100).

Almost surely, 2^18666712 is an apocalyptic number.

It is an amenable number.

18666712 is a deficient number, since it is larger than the sum of its proper divisors (17462888).

18666712 is a wasteful number, since it uses less digits than its factorization.

18666712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75306 (or 75302 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 18666712 is about 4320.4990452493. The cubic root of 18666712 is about 265.2706952690.

The spelling of 18666712 in words is "eighteen million, six hundred sixty-six thousand, seven hundred twelve".