18680597 has 16 divisors (see below), whose sum is σ = 20990592. Its totient is φ = 16511040.

The previous prime is 18680593. The next prime is 18680609. The reversal of 18680597 is 79508681.

It is a happy number.

It is not a de Polignac number, because 18680597 - 2² = 18680593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33878 + ... + 34424.

It is an arithmetic number, because the mean of its divisors is an integer number (1311912).

Almost surely, 2^18680597 is an apocalyptic number.

It is an amenable number.

18680597 is a deficient number, since it is larger than the sum of its proper divisors (2309995).

18680597 is a wasteful number, since it uses less digits than its factorization.

18680597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 18680597 is about 4322.1056211065. The cubic root of 18680597 is about 265.3364517294.

The spelling of 18680597 in words is "eighteen million, six hundred eighty thousand, five hundred ninety-seven".