18677680 has 40 divisors (see below), whose sum is σ = 49630752. Its totient is φ = 6403584.

The previous prime is 18677671. The next prime is 18677683. The reversal of 18677680 is 8677681.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (18677683) 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, 16117 + ... + 17236.

Almost surely, 2^18677680 is an apocalyptic number.

18677680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18677680 is an abundant number, since it is smaller than the sum of its proper divisors (30953072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18677680 is a wasteful number, since it uses less digits than its factorization.

18677680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33373 (or 33367 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 18677680 is about 4321.7681566692. The cubic root of 18677680 is about 265.3226401309.

Subtracting from 18677680 its reverse (8677681), we obtain a palindrome (9999999).

The spelling of 18677680 in words is "eighteen million, six hundred seventy-seven thousand, six hundred eighty".