18925121 has 8 divisors (see below), whose sum is σ = 20203200. Its totient is φ = 17675280.

The previous prime is 18925111. The next prime is 18925201. The reversal of 18925121 is 12152981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18925121 - 2¹⁰ = 18924097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18925111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5666 + ... + 8363.

It is an arithmetic number, because the mean of its divisors is an integer number (2525400).

Almost surely, 2^18925121 is an apocalyptic number.

It is an amenable number.

18925121 is a deficient number, since it is larger than the sum of its proper divisors (1278079).

18925121 is a wasteful number, since it uses less digits than its factorization.

18925121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14119.

The product of its digits is 1440, while the sum is 29.

The square root of 18925121 is about 4350.3012539363. The cubic root of 18925121 is about 266.4891643400.

The spelling of 18925121 in words is "eighteen million, nine hundred twenty-five thousand, one hundred twenty-one".