18201025 has 12 divisors (see below), whose sum is σ = 22630000. Its totient is φ = 14521680.

The previous prime is 18201013. The next prime is 18201041. The reversal of 18201025 is 52010281.

It is not a de Polignac number, because 18201025 - 2⁹ = 18200513 is a prime.

It is a super-2 number, since 2×18201025² = 662554622101250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18200993 and 18201011.

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, 11746 + ... + 13204.

Almost surely, 2^18201025 is an apocalyptic number.

It is an amenable number.

18201025 is a deficient number, since it is larger than the sum of its proper divisors (4428975).

18201025 is a wasteful number, since it uses less digits than its factorization.

18201025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1963 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 18201025 is about 4266.2659317019. The cubic root of 18201025 is about 263.0461493806.

The spelling of 18201025 in words is "eighteen million, two hundred one thousand, twenty-five".