18642125 has 16 divisors (see below), whose sum is σ = 23390640. Its totient is φ = 14833600.

The previous prime is 18642109. The next prime is 18642133. The reversal of 18642125 is 52124681.

It can be written as a sum of positive squares in 8 ways, for example, as 477481 + 18164644 = 691^2 + 4262^2 .

It is not a de Polignac number, because 18642125 - 2⁴ = 18642109 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 36371 + ... + 36879.

It is an arithmetic number, because the mean of its divisors is an integer number (1461915).

Almost surely, 2^18642125 is an apocalyptic number.

It is an amenable number.

18642125 is a deficient number, since it is larger than the sum of its proper divisors (4748515).

18642125 is an equidigital number, since it uses as much as digits as its factorization.

18642125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 807 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 18642125 is about 4317.6527187814. The cubic root of 18642125 is about 265.1541763328.

The spelling of 18642125 in words is "eighteen million, six hundred forty-two thousand, one hundred twenty-five".