18941830 has 16 divisors (see below), whose sum is σ = 34528320. Its totient is φ = 7480512.

The previous prime is 18941807. The next prime is 18941849. The reversal of 18941830 is 3814981.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent 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, 11199 + ... + 12778.

It is an arithmetic number, because the mean of its divisors is an integer number (2158020).

Almost surely, 2^18941830 is an apocalyptic number.

18941830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18941830 is a deficient number, since it is larger than the sum of its proper divisors (15586490).

18941830 is a wasteful number, since it uses less digits than its factorization.

18941830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24063.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18941830 is about 4352.2212719484. The cubic root of 18941830 is about 266.5675690811.

The spelling of 18941830 in words is "eighteen million, nine hundred forty-one thousand, eight hundred thirty".