18000051 has 8 divisors (see below), whose sum is σ = 24053760. Its totient is φ = 11973192.

The previous prime is 18000041. The next prime is 18000067. The reversal of 18000051 is 15000081.

It is a happy number.

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

It is not a de Polignac number, because 18000051 - 2⁶ = 17999987 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (18000041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5091 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (3006720).

Almost surely, 2^18000051 is an apocalyptic number.

18000051 is a deficient number, since it is larger than the sum of its proper divisors (6053709).

18000051 is a wasteful number, since it uses less digits than its factorization.

18000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13425.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 18000051 is about 4242.6466975227. The cubic root of 18000051 is about 262.0743869351.

The spelling of 18000051 in words is "eighteen million, fifty-one", and thus it is an aban number and an uban number.