18225837 has 32 divisors (see below), whose sum is σ = 31304960. Its totient is φ = 10264320.

The previous prime is 18225811. The next prime is 18225839. The reversal of 18225837 is 73852281.

It is not a de Polignac number, because 18225837 - 2²⁰ = 17177261 is a prime.

It is a super-2 number, since 2×18225837² = 664362268701138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18225839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13137 + ... + 14457.

It is an arithmetic number, because the mean of its divisors is an integer number (978280).

Almost surely, 2^18225837 is an apocalyptic number.

It is an amenable number.

18225837 is a deficient number, since it is larger than the sum of its proper divisors (13079123).

18225837 is a wasteful number, since it uses less digits than its factorization.

18225837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1404 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18225837 is about 4269.1728707093. The cubic root of 18225837 is about 263.1656250241.

The spelling of 18225837 in words is "eighteen million, two hundred twenty-five thousand, eight hundred thirty-seven".