18218450 has 24 divisors (see below), whose sum is σ = 34075200. Its totient is φ = 7246800.

The previous prime is 18218449. The next prime is 18218477. The reversal of 18218450 is 5481281.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9035 + ... + 10865.

It is an arithmetic number, because the mean of its divisors is an integer number (1419800).

Almost surely, 2^18218450 is an apocalyptic number.

18218450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18218450 is a deficient number, since it is larger than the sum of its proper divisors (15856750).

18218450 is a wasteful number, since it uses less digits than its factorization.

18218450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18218450 is about 4268.3076271515. The cubic root of 18218450 is about 263.1300662152.

The spelling of 18218450 in words is "eighteen million, two hundred eighteen thousand, four hundred fifty".