18225996 has 24 divisors (see below), whose sum is σ = 42906864. Its totient is φ = 6021120.

The previous prime is 18225979. The next prime is 18226001. The reversal of 18225996 is 69952281.

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 7 ways as a sum of consecutive naturals, for example, 5365 + ... + 8076.

It is an arithmetic number, because the mean of its divisors is an integer number (1787786).

Almost surely, 2^18225996 is an apocalyptic number.

It is an amenable number.

18225996 is an abundant number, since it is smaller than the sum of its proper divisors (24680868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18225996 is a wasteful number, since it uses less digits than its factorization.

18225996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13561 (or 13559 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 18225996 is about 4269.1914925428. The cubic root of 18225996 is about 263.1663902970.

The spelling of 18225996 in words is "eighteen million, two hundred twenty-five thousand, nine hundred ninety-six".