18773425 has 24 divisors (see below), whose sum is σ = 26739360. Its totient is φ = 12931200.

The previous prime is 18773407. The next prime is 18773429. The reversal of 18773425 is 52437781.

It is not a de Polignac number, because 18773425 - 2¹⁹ = 18249137 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18773429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3429 + ... + 7021.

It is an arithmetic number, because the mean of its divisors is an integer number (1114140).

Almost surely, 2^18773425 is an apocalyptic number.

It is an amenable number.

18773425 is a deficient number, since it is larger than the sum of its proper divisors (7965935).

18773425 is a wasteful number, since it uses less digits than its factorization.

18773425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633 (or 3628 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 18773425 is about 4332.8310606346. The cubic root of 18773425 is about 265.7752308188.

The spelling of 18773425 in words is "eighteen million, seven hundred seventy-three thousand, four hundred twenty-five".