18480625631 has 16 divisors (see below), whose sum is σ = 20197810080. Its totient is φ = 16807042560.

The previous prime is 18480625621. The next prime is 18480625651. The reversal of 18480625631 is 13652608481.

It is a cyclic number.

It is not a de Polignac number, because 18480625631 - 2³⁰ = 17406883807 is a prime.

It is a super-2 number, since 2×18480625631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18480625621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296696 + ... + 353538.

It is an arithmetic number, because the mean of its divisors is an integer number (1262363130).

Almost surely, 2^18480625631 is an apocalyptic number.

18480625631 is a deficient number, since it is larger than the sum of its proper divisors (1717184449).

18480625631 is a wasteful number, since it uses less digits than its factorization.

18480625631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57226.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 18480625631 in words is "eighteen billion, four hundred eighty million, six hundred twenty-five thousand, six hundred thirty-one".