18143874 has 24 divisors (see below), whose sum is σ = 44928000. Its totient is φ = 5183928.

The previous prime is 18143863. The next prime is 18143891. The reversal of 18143874 is 47834181.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71874 + ... + 72125.

It is an arithmetic number, because the mean of its divisors is an integer number (1872000).

Almost surely, 2^18143874 is an apocalyptic number.

18143874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18143874 is an abundant number, since it is smaller than the sum of its proper divisors (26784126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18143874 is a wasteful number, since it uses less digits than its factorization.

18143874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144014 (or 144011 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 18143874 is about 4259.5626536066. The cubic root of 18143874 is about 262.7705401253.

Adding to 18143874 its product of digits (21504), we get a triangular number (18165378 = T₆₀₂₇).

The spelling of 18143874 in words is "eighteen million, one hundred forty-three thousand, eight hundred seventy-four".