18223130 has 16 divisors (see below), whose sum is σ = 34228224. Its totient is φ = 6972240.

The previous prime is 18223097. The next prime is 18223141. The reversal of 18223130 is 3132281.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39386 + ... + 39845.

It is an arithmetic number, because the mean of its divisors is an integer number (2139264).

Almost surely, 2^18223130 is an apocalyptic number.

18223130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18223130 is a deficient number, since it is larger than the sum of its proper divisors (16005094).

18223130 is a wasteful number, since it uses less digits than its factorization.

18223130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79261.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 18223130 is about 4268.8558186006. The cubic root of 18223130 is about 263.1525954512.

The spelling of 18223130 in words is "eighteen million, two hundred twenty-three thousand, one hundred thirty".