18694672 has 20 divisors (see below), whose sum is σ = 36287980. Its totient is φ = 9330048.

The previous prime is 18694619. The next prime is 18694691. The reversal of 18694672 is 27649681.

It can be written as a sum of positive squares in 2 ways, for example, as 14868736 + 3825936 = 3856^2 + 1956^2 .

It is a super-2 number, since 2×18694672² = 698981522375168, which contains 22 as substring.

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, 16558 + ... + 17650.

It is an arithmetic number, because the mean of its divisors is an integer number (1814399).

Almost surely, 2^18694672 is an apocalyptic number.

It is an amenable number.

18694672 is a deficient number, since it is larger than the sum of its proper divisors (17593308).

18694672 is a wasteful number, since it uses less digits than its factorization.

18694672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 2164 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 18694672 is about 4323.7335718104. The cubic root of 18694672 is about 265.4030747429.

The spelling of 18694672 in words is "eighteen million, six hundred ninety-four thousand, six hundred seventy-two".