18255945 has 8 divisors (see below), whose sum is σ = 29209536. Its totient is φ = 9736496.

The previous prime is 18255929. The next prime is 18255949. The reversal of 18255945 is 54955281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18255945 - 2⁴ = 18255929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18255949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608517 + ... + 608546.

It is an arithmetic number, because the mean of its divisors is an integer number (3651192).

Almost surely, 2^18255945 is an apocalyptic number.

18255945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18255945 is a deficient number, since it is larger than the sum of its proper divisors (10953591).

18255945 is a wasteful number, since it uses less digits than its factorization.

18255945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217071.

The product of its digits is 72000, while the sum is 39.

The square root of 18255945 is about 4272.6976256225. The cubic root of 18255945 is about 263.3104566286.

The spelling of 18255945 in words is "eighteen million, two hundred fifty-five thousand, nine hundred forty-five".