18655290131 has 8 divisors (see below), whose sum is σ = 18777029040. Its totient is φ = 18533711392.

The previous prime is 18655290103. The next prime is 18655290191. The reversal of 18655290131 is 13109255681.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18655290131 is a prime.

It is a super-2 number, since 2×18655290131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18655290191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198260 + ... + 276798.

It is an arithmetic number, because the mean of its divisors is an integer number (2347128630).

Almost surely, 2^18655290131 is an apocalyptic number.

18655290131 is a deficient number, since it is larger than the sum of its proper divisors (121738909).

18655290131 is a wasteful number, since it uses less digits than its factorization.

18655290131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80085.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 18655290131 in words is "eighteen billion, six hundred fifty-five million, two hundred ninety thousand, one hundred thirty-one".