18306166051 has 4 divisors (see below), whose sum is σ = 18511853400. Its totient is φ = 18100478704.

The previous prime is 18306166031. The next prime is 18306166079. The reversal of 18306166051 is 15066160381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15066160381 = 53 ⋅284267177.

It is a cyclic number.

It is not a de Polignac number, because 18306166051 - 2⁵ = 18306166019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18306166051.

It is not an unprimeable number, because it can be changed into a prime (18306166031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102843541 + ... + 102843718.

It is an arithmetic number, because the mean of its divisors is an integer number (4627963350).

Almost surely, 2^18306166051 is an apocalyptic number.

18306166051 is a deficient number, since it is larger than the sum of its proper divisors (205687349).

18306166051 is an equidigital number, since it uses as much as digits as its factorization.

18306166051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205687348.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 18306166051 in words is "eighteen billion, three hundred six million, one hundred sixty-six thousand, fifty-one".