18225867 has 48 divisors (see below), whose sum is σ = 29111040. Its totient is φ = 10105920.

The previous prime is 18225859. The next prime is 18225869. The reversal of 18225867 is 76852281.

It is not a de Polignac number, because 18225867 - 2³ = 18225859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18225869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308884 + ... + 308942.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^18225867 is an apocalyptic number.

18225867 is a deficient number, since it is larger than the sum of its proper divisors (10885173).

18225867 is a wasteful number, since it uses less digits than its factorization.

18225867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 133 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 18225867 is about 4269.1763842690. The cubic root of 18225867 is about 263.1657694156.

The spelling of 18225867 in words is "eighteen million, two hundred twenty-five thousand, eight hundred sixty-seven".