18676681 has 8 divisors (see below), whose sum is σ = 18982080. Its totient is φ = 18373872.

The previous prime is 18676673. The next prime is 18676687. The reversal of 18676681 is 18667681.

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

It is a cyclic number.

It is not a de Polignac number, because 18676681 - 2³ = 18676673 is a prime.

It is a super-2 number, since 2×18676681² = 697636826351522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18676687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17931 + ... + 18943.

It is an arithmetic number, because the mean of its divisors is an integer number (2372760).

Almost surely, 2^18676681 is an apocalyptic number.

It is an amenable number.

18676681 is a deficient number, since it is larger than the sum of its proper divisors (305399).

18676681 is a wasteful number, since it uses less digits than its factorization.

18676681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295.

The product of its digits is 96768, while the sum is 43.

The square root of 18676681 is about 4321.6525774291. The cubic root of 18676681 is about 265.3179096711.

It can be divided in two parts, 186 and 76681, that added together give a palindrome (76867).

The spelling of 18676681 in words is "eighteen million, six hundred seventy-six thousand, six hundred eighty-one".