18020874 has 16 divisors (see below), whose sum is σ = 36172512. Its totient is φ = 5985168.

The previous prime is 18020851. The next prime is 18020897. The reversal of 18020874 is 47802081.

It is an interprime number because it is at equal distance from previous prime (18020851) and next prime (18020897).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3609 + ... + 7004.

It is an arithmetic number, because the mean of its divisors is an integer number (2260782).

Almost surely, 2^18020874 is an apocalyptic number.

18020874 is an abundant number, since it is smaller than the sum of its proper divisors (18151638).

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

18020874 is a wasteful number, since it uses less digits than its factorization.

18020874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10901.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 18020874 is about 4245.0999988222. The cubic root of 18020874 is about 262.1754065002.

The spelling of 18020874 in words is "eighteen million, twenty thousand, eight hundred seventy-four".