18660873 has 16 divisors (see below), whose sum is σ = 31021056. Its totient is φ = 9693840.

The previous prime is 18660857. The next prime is 18660893. The reversal of 18660873 is 37806681.

It is not a de Polignac number, because 18660873 - 2⁴ = 18660857 is a prime.

It is a super-2 number, since 2×18660873² = 696456362244258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18660893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40161 + ... + 40622.

It is an arithmetic number, because the mean of its divisors is an integer number (1938816).

Almost surely, 2^18660873 is an apocalyptic number.

It is an amenable number.

18660873 is a deficient number, since it is larger than the sum of its proper divisors (12360183).

18660873 is a wasteful number, since it uses less digits than its factorization.

18660873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80804.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 18660873 is about 4319.8232602735. The cubic root of 18660873 is about 265.2430332448.

It can be divided in two parts, 186608 and 73, that added together give a palindrome (186681).

The spelling of 18660873 in words is "eighteen million, six hundred sixty thousand, eight hundred seventy-three".