18985834 has 24 divisors (see below), whose sum is σ = 33373728. Its totient is φ = 8076600.

The previous prime is 18985831. The next prime is 18985843. The reversal of 18985834 is 43858981.

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

It is not an unprimeable number, because it can be changed into a prime (18985831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14157 + ... + 15439.

It is an arithmetic number, because the mean of its divisors is an integer number (1390572).

Almost surely, 2^18985834 is an apocalyptic number.

18985834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18985834 is a deficient number, since it is larger than the sum of its proper divisors (14387894).

18985834 is a wasteful number, since it uses less digits than its factorization.

18985834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1443 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The square root of 18985834 is about 4357.2736889023. The cubic root of 18985834 is about 266.7738315808.

The spelling of 18985834 in words is "eighteen million, nine hundred eighty-five thousand, eight hundred thirty-four".