18630857477138 has 8 divisors (see below), whose sum is σ = 27967733868288. Its totient is φ = 9308279521044.

The previous prime is 18630857477137. The next prime is 18630857477143. The reversal of 18630857477138 is 83177475803681.

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

It is not an unprimeable number, because it can be changed into a prime (18630857477137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3574605506 + ... + 3574610717.

It is an arithmetic number, because the mean of its divisors is an integer number (3495966733536).

Almost surely, 2^{18630857477138} is an apocalyptic number.

18630857477138 is a deficient number, since it is larger than the sum of its proper divisors (9336876391150).

18630857477138 is a wasteful number, since it uses less digits than its factorization.

18630857477138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7149217528.

The product of its (nonzero) digits is 189665280, while the sum is 68.

The spelling of 18630857477138 in words is "eighteen trillion, six hundred thirty billion, eight hundred fifty-seven million, four hundred seventy-seven thousand, one hundred thirty-eight".