18020883 has 4 divisors (see below), whose sum is σ = 24027848. Its totient is φ = 12013920.

The previous prime is 18020851. The next prime is 18020897. The reversal of 18020883 is 38802081.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18020883 - 2⁵ = 18020851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18020883.

It is not an unprimeable number, because it can be changed into a prime (18020183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3003478 + ... + 3003483.

It is an arithmetic number, because the mean of its divisors is an integer number (6006962).

Almost surely, 2^18020883 is an apocalyptic number.

18020883 is a deficient number, since it is larger than the sum of its proper divisors (6006965).

18020883 is an equidigital number, since it uses as much as digits as its factorization.

18020883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6006964.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18020883 is about 4245.1010588677. The cubic root of 18020883 is about 262.1754501455.

The spelling of 18020883 in words is "eighteen million, twenty thousand, eight hundred eighty-three".