18223025 has 6 divisors (see below), whose sum is σ = 22596582. Its totient is φ = 14578400.

The previous prime is 18223019. The next prime is 18223057. The reversal of 18223025 is 52032281.

It can be written as a sum of positive squares in 3 ways, for example, as 524176 + 17698849 = 724^2 + 4207^2 .

It is not a de Polignac number, because 18223025 - 2⁶ = 18222961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364436 + ... + 364485.

It is an arithmetic number, because the mean of its divisors is an integer number (3766097).

Almost surely, 2^18223025 is an apocalyptic number.

It is an amenable number.

18223025 is a deficient number, since it is larger than the sum of its proper divisors (4373557).

18223025 is an equidigital number, since it uses as much as digits as its factorization.

18223025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728931 (or 728926 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18223025 is about 4268.8435202054. The cubic root of 18223025 is about 263.1520900299.

The spelling of 18223025 in words is "eighteen million, two hundred twenty-three thousand, twenty-five".