18650625 has 80 divisors (see below), whose sum is σ = 37488000. Its totient is φ = 8232000.

The previous prime is 18650617. The next prime is 18650629. The reversal of 18650625 is 52605681.

It is not a de Polignac number, because 18650625 - 2³ = 18650617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18650629) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 643111 + ... + 643139.

It is an arithmetic number, because the mean of its divisors is an integer number (468600).

Almost surely, 2^18650625 is an apocalyptic number.

18650625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18650625 is an abundant number, since it is smaller than the sum of its proper divisors (18837375).

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

18650625 is an frugal number, since it uses more digits than its factorization.

18650625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 18650625 is about 4318.6369377386. The cubic root of 18650625 is about 265.1944698086.

The spelling of 18650625 in words is "eighteen million, six hundred fifty thousand, six hundred twenty-five".