18887425 has 24 divisors (see below), whose sum is σ = 26114400. Its totient is φ = 13466880.

The previous prime is 18887383. The next prime is 18887437. The reversal of 18887425 is 52478881.

It is not a de Polignac number, because 18887425 - 2⁹ = 18886913 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6906 + ... + 9244.

It is an arithmetic number, because the mean of its divisors is an integer number (1088100).

Almost surely, 2^18887425 is an apocalyptic number.

It is an amenable number.

18887425 is a deficient number, since it is larger than the sum of its proper divisors (7226975).

18887425 is a wasteful number, since it uses less digits than its factorization.

18887425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385 (or 2380 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 18887425 is about 4345.9665208098. The cubic root of 18887425 is about 266.3121112635.

The spelling of 18887425 in words is "eighteen million, eight hundred eighty-seven thousand, four hundred twenty-five".