18738425 has 12 divisors (see below), whose sum is σ = 23290176. Its totient is φ = 14955600.

The previous prime is 18738373. The next prime is 18738439. The reversal of 18738425 is 52483781.

It is not a de Polignac number, because 18738425 - 2⁶ = 18738361 is a prime.

It is a super-2 number, since 2×18738425² = 702257142961250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17660 + ... + 18690.

It is an arithmetic number, because the mean of its divisors is an integer number (1940848).

Almost surely, 2^18738425 is an apocalyptic number.

It is an amenable number.

18738425 is a deficient number, since it is larger than the sum of its proper divisors (4551751).

18738425 is a wasteful number, since it uses less digits than its factorization.

18738425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 1763 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 18738425 is about 4328.7902467087. The cubic root of 18738425 is about 265.6099631626.

The spelling of 18738425 in words is "eighteen million, seven hundred thirty-eight thousand, four hundred twenty-five".