18426830 has 24 divisors (see below), whose sum is σ = 33794712. Its totient is φ = 7233056.

The previous prime is 18426817. The next prime is 18426857. The reversal of 18426830 is 3862481.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 123596 + ... + 123744.

It is an arithmetic number, because the mean of its divisors is an integer number (1408113).

Almost surely, 2^18426830 is an apocalyptic number.

18426830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18426830 is a deficient number, since it is larger than the sum of its proper divisors (15367882).

18426830 is an equidigital number, since it uses as much as digits as its factorization.

18426830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18426830 is about 4292.6483666846. The cubic root of 18426830 is about 264.1294800270.

The spelling of 18426830 in words is "eighteen million, four hundred twenty-six thousand, eight hundred thirty".