18902225 has 12 divisors (see below), whose sum is σ = 23938944. Its totient is φ = 14799120.

The previous prime is 18902201. The next prime is 18902231. The reversal of 18902225 is 52220981.

It is not a de Polignac number, because 18902225 - 2¹² = 18898129 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 11 ways as a sum of consecutive naturals, for example, 6869 + ... + 9218.

It is an arithmetic number, because the mean of its divisors is an integer number (1994912).

Almost surely, 2^18902225 is an apocalyptic number.

It is an amenable number.

18902225 is a deficient number, since it is larger than the sum of its proper divisors (5036719).

18902225 is a wasteful number, since it uses less digits than its factorization.

18902225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16144 (or 16139 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18902225 is about 4347.6689156374. The cubic root of 18902225 is about 266.3816529507.

The spelling of 18902225 in words is "eighteen million, nine hundred two thousand, two hundred twenty-five".