18776225 has 12 divisors (see below), whose sum is σ = 25073916. Its totient is φ = 13865280.

The previous prime is 18776221. The next prime is 18776249. The reversal of 18776225 is 52267781.

It can be written as a sum of positive squares in 6 ways, for example, as 6990736 + 11785489 = 2644^2 + 3433^2 .

It is not a de Polignac number, because 18776225 - 2² = 18776221 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18776221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28562 + ... + 29211.

It is an arithmetic number, because the mean of its divisors is an integer number (2089493).

Almost surely, 2^18776225 is an apocalyptic number.

It is an amenable number.

18776225 is a deficient number, since it is larger than the sum of its proper divisors (6297691).

18776225 is a wasteful number, since it uses less digits than its factorization.

18776225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57796 (or 57791 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 18776225 is about 4333.1541629626. The cubic root of 18776225 is about 265.7884433547.

The spelling of 18776225 in words is "eighteen million, seven hundred seventy-six thousand, two hundred twenty-five".