18383225 has 24 divisors (see below), whose sum is σ = 26426880. Its totient is φ = 12424320.

The previous prime is 18383213. The next prime is 18383227. The reversal of 18383225 is 52238381.

It is not a de Polignac number, because 18383225 - 2²² = 14188921 is a prime.

It is a super-2 number, since 2×18383225² = 675885922801250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18383191 and 18383200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18383227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12056 + ... + 13494.

It is an arithmetic number, because the mean of its divisors is an integer number (1101120).

Almost surely, 2^18383225 is an apocalyptic number.

It is an amenable number.

18383225 is a deficient number, since it is larger than the sum of its proper divisors (8043655).

18383225 is a wasteful number, since it uses less digits than its factorization.

18383225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1524 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 18383225 is about 4287.5663260176. The cubic root of 18383225 is about 263.9209713328.

The spelling of 18383225 in words is "eighteen million, three hundred eighty-three thousand, two hundred twenty-five".