18668373 has 16 divisors (see below), whose sum is σ = 26049600. Its totient is φ = 11876480.

The previous prime is 18668369. The next prime is 18668381. The reversal of 18668373 is 37386681.

It is a cyclic number.

It is not a de Polignac number, because 18668373 - 2² = 18668369 is a prime.

It is a super-3 number, since 3×18668373³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668303) 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, 6538 + ... + 8948.

It is an arithmetic number, because the mean of its divisors is an integer number (1628100).

Almost surely, 2^18668373 is an apocalyptic number.

It is an amenable number.

18668373 is a deficient number, since it is larger than the sum of its proper divisors (7381227).

18668373 is a wasteful number, since it uses less digits than its factorization.

18668373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532.

The product of its digits is 145152, while the sum is 42.

The square root of 18668373 is about 4320.6912641382. The cubic root of 18668373 is about 265.2785631349.

The spelling of 18668373 in words is "eighteen million, six hundred sixty-eight thousand, three hundred seventy-three".