18020822 has 8 divisors (see below), whose sum is σ = 28206576. Its totient is φ = 8618632.

The previous prime is 18020819. The next prime is 18020831. The reversal of 18020822 is 22802081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195833 + ... + 195924.

It is an arithmetic number, because the mean of its divisors is an integer number (3525822).

Almost surely, 2^18020822 is an apocalyptic number.

18020822 is a deficient number, since it is larger than the sum of its proper divisors (10185754).

18020822 is a wasteful number, since it uses less digits than its factorization.

18020822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391782.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 18020822 is about 4245.0938741093. The cubic root of 18020822 is about 262.1751543272.

The spelling of 18020822 in words is "eighteen million, twenty thousand, eight hundred twenty-two".