18630012731511 has 32 divisors (see below), whose sum is σ = 26469344643840. Its totient is φ = 11621516822784.

The previous prime is 18630012731471. The next prime is 18630012731557. The reversal of 18630012731511 is 11513721003681.

It is not a de Polignac number, because 18630012731511 - 2¹⁵ = 18630012698743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18630012731511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18630012732511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17620245 + ... + 18647601.

It is an arithmetic number, because the mean of its divisors is an integer number (827167020120).

Almost surely, 2^{18630012731511} is an apocalyptic number.

18630012731511 is a deficient number, since it is larger than the sum of its proper divisors (7839331912329).

18630012731511 is a wasteful number, since it uses less digits than its factorization.

18630012731511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031295.

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 18630012731511 in words is "eighteen trillion, six hundred thirty billion, twelve million, seven hundred thirty-one thousand, five hundred eleven".