18225964 has 6 divisors (see below), whose sum is σ = 31895444. Its totient is φ = 9112980.

The previous prime is 18225947. The next prime is 18225967. The reversal of 18225964 is 46952281.

It is not an unprimeable number, because it can be changed into a prime (18225967) by changing a digit.

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 as a sum of consecutive naturals, namely, 2278242 + ... + 2278249.

Almost surely, 2^18225964 is an apocalyptic number.

It is an amenable number.

18225964 is a deficient number, since it is larger than the sum of its proper divisors (13669480).

18225964 is a wasteful number, since it uses less digits than its factorization.

18225964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556495 (or 4556493 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 18225964 is about 4269.1877447589. The cubic root of 18225964 is about 263.1662362801.

The spelling of 18225964 in words is "eighteen million, two hundred twenty-five thousand, nine hundred sixty-four".