18613217051 has 24 divisors (see below), whose sum is σ = 22015831104. Its totient is φ = 15599307360.

The previous prime is 18613217039. The next prime is 18613217053. The reversal of 18613217051 is 15071231681.

It is a de Polignac number, because none of the positive numbers 2^k-18613217051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18613217053) 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 23 ways as a sum of consecutive naturals, for example, 1531340 + ... + 1543446.

It is an arithmetic number, because the mean of its divisors is an integer number (917326296).

Almost surely, 2^18613217051 is an apocalyptic number.

18613217051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18613217051 is a deficient number, since it is larger than the sum of its proper divisors (3402614053).

18613217051 is a wasteful number, since it uses less digits than its factorization.

18613217051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12971 (or 12958 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 18613217051 in words is "eighteen billion, six hundred thirteen million, two hundred seventeen thousand, fifty-one".