18762225 has 24 divisors (see below), whose sum is σ = 31352160. Its totient is φ = 9899520.

The previous prime is 18762221. The next prime is 18762251. The reversal of 18762225 is 52226781.

It is not a de Polignac number, because 18762225 - 2² = 18762221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18762221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5986 + ... + 8564.

It is an arithmetic number, because the mean of its divisors is an integer number (1306340).

Almost surely, 2^18762225 is an apocalyptic number.

18762225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18762225 is a deficient number, since it is larger than the sum of its proper divisors (12589935).

18762225 is a wasteful number, since it uses less digits than its factorization.

18762225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689 (or 2684 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 18762225 is about 4331.5384103111. The cubic root of 18762225 is about 265.7223675341.

The spelling of 18762225 in words is "eighteen million, seven hundred sixty-two thousand, two hundred twenty-five".