18672230 has 48 divisors (see below), whose sum is σ = 36462960. Its totient is φ = 6874560.

The previous prime is 18672221. The next prime is 18672253. The reversal of 18672230 is 3227681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 18672193 and 18672202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278657 + ... + 278723.

It is an arithmetic number, because the mean of its divisors is an integer number (759645).

Almost surely, 2^18672230 is an apocalyptic number.

18672230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18672230 is a deficient number, since it is larger than the sum of its proper divisors (17790730).

18672230 is a wasteful number, since it uses less digits than its factorization.

18672230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 18672230 is about 4321.1375817023. The cubic root of 18672230 is about 265.2968312678.

The spelling of 18672230 in words is "eighteen million, six hundred seventy-two thousand, two hundred thirty".