18010725251 has 16 divisors (see below), whose sum is σ = 18426112320. Its totient is φ = 17599610880.

The previous prime is 18010725223. The next prime is 18010725263. The reversal of 18010725251 is 15252701081.

It is a cyclic number.

It is not a de Polignac number, because 18010725251 - 2³⁴ = 830856067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18010725151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6880895 + ... + 6883511.

It is an arithmetic number, because the mean of its divisors is an integer number (1151632020).

Almost surely, 2^18010725251 is an apocalyptic number.

18010725251 is a deficient number, since it is larger than the sum of its proper divisors (415387069).

18010725251 is a wasteful number, since it uses less digits than its factorization.

18010725251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374.

The product of its (nonzero) digits is 5600, while the sum is 32.

The spelling of 18010725251 in words is "eighteen billion, ten million, seven hundred twenty-five thousand, two hundred fifty-one".