18066874 has 8 divisors (see below), whose sum is σ = 30971808. Its totient is φ = 7742940.

The previous prime is 18066871. The next prime is 18066883. The reversal of 18066874 is 47866081.

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

It is a super-2 number, since 2×18066874² = 652823872263752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18066871) 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, 645232 + ... + 645259.

It is an arithmetic number, because the mean of its divisors is an integer number (3871476).

Almost surely, 2^18066874 is an apocalyptic number.

18066874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18066874 is a deficient number, since it is larger than the sum of its proper divisors (12904934).

18066874 is a wasteful number, since it uses less digits than its factorization.

18066874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290500.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 18066874 is about 4250.5145570860. The cubic root of 18066874 is about 262.3982928732.

The spelling of 18066874 in words is "eighteen million, sixty-six thousand, eight hundred seventy-four".