18071825 has 12 divisors (see below), whose sum is σ = 22931568. Its totient is φ = 14120400.

The previous prime is 18071819. The next prime is 18071827. The reversal of 18071825 is 52817081.

It is a happy number.

It is not a de Polignac number, because 18071825 - 2⁶ = 18071761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18071791 and 18071800.

It is not an unprimeable number, because it can be changed into a prime (18071827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7331 + ... + 9480.

It is an arithmetic number, because the mean of its divisors is an integer number (1910964).

Almost surely, 2^18071825 is an apocalyptic number.

It is an amenable number.

18071825 is a deficient number, since it is larger than the sum of its proper divisors (4859743).

18071825 is a wasteful number, since it uses less digits than its factorization.

18071825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16864 (or 16859 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 18071825 is about 4251.0969172674. The cubic root of 18071825 is about 262.4222596700.

The spelling of 18071825 in words is "eighteen million, seventy-one thousand, eight hundred twenty-five".