18450025 has 24 divisors (see below), whose sum is σ = 26051904. Its totient is φ = 12830400.

The previous prime is 18450011. The next prime is 18450031. The reversal of 18450025 is 52005481.

It is not a de Polignac number, because 18450025 - 2¹⁵ = 18417257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4867 + ... + 7783.

It is an arithmetic number, because the mean of its divisors is an integer number (1085496).

Almost surely, 2^18450025 is an apocalyptic number.

It is an amenable number.

18450025 is a deficient number, since it is larger than the sum of its proper divisors (7601879).

18450025 is a wasteful number, since it uses less digits than its factorization.

18450025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961 (or 2956 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 18450025 is about 4295.3492291082. The cubic root of 18450025 is about 264.2402589743.

The spelling of 18450025 in words is "eighteen million, four hundred fifty thousand, twenty-five".