18361534051 has 16 divisors (see below), whose sum is σ = 22092847360. Its totient is φ = 14907564000.

The previous prime is 18361534033. The next prime is 18361534057. The reversal of 18361534051 is 15043516381.

It is not a de Polignac number, because 18361534051 - 2⁷ = 18361533923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18361534051.

It is not an unprimeable number, because it can be changed into a prime (18361534057) 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 15 ways as a sum of consecutive naturals, for example, 1390060 + ... + 1403206.

It is an arithmetic number, because the mean of its divisors is an integer number (1380802960).

Almost surely, 2^18361534051 is an apocalyptic number.

18361534051 is a deficient number, since it is larger than the sum of its proper divisors (3731313309).

18361534051 is a wasteful number, since it uses less digits than its factorization.

18361534051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23674.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 18361534051 in words is "eighteen billion, three hundred sixty-one million, five hundred thirty-four thousand, fifty-one".