18642025 has 12 divisors (see below), whose sum is σ = 23411200. Its totient is φ = 14723280.

The previous prime is 18642017. The next prime is 18642037. The reversal of 18642025 is 52024681.

It is not a de Polignac number, because 18642025 - 2³ = 18642017 is a prime.

It is a super-2 number, since 2×18642025² = 695050192201250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18641984 and 18642002.

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, 2745 + ... + 6694.

Almost surely, 2^18642025 is an apocalyptic number.

It is an amenable number.

18642025 is a deficient number, since it is larger than the sum of its proper divisors (4769175).

18642025 is an equidigital number, since it uses as much as digits as its factorization.

18642025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9528 (or 9523 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 18642025 is about 4317.6411383995. The cubic root of 18642025 is about 265.1537022190.

The spelling of 18642025 in words is "eighteen million, six hundred forty-two thousand, twenty-five".