18942425 has 12 divisors (see below), whose sum is σ = 23617536. Its totient is φ = 15070800.

The previous prime is 18942419. The next prime is 18942439. The reversal of 18942425 is 52424981.

It is not a de Polignac number, because 18942425 - 2⁸ = 18942169 is a prime.

It is a Duffinian 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, 2792 + ... + 6758.

It is an arithmetic number, because the mean of its divisors is an integer number (1968128).

Almost surely, 2^18942425 is an apocalyptic number.

It is an amenable number.

18942425 is a deficient number, since it is larger than the sum of its proper divisors (4675111).

18942425 is a wasteful number, since it uses less digits than its factorization.

18942425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4163 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 18942425 is about 4352.2896273111. The cubic root of 18942425 is about 266.5703601884.

The spelling of 18942425 in words is "eighteen million, nine hundred forty-two thousand, four hundred twenty-five".