18222790 has 16 divisors (see below), whose sum is σ = 32849712. Its totient is φ = 7278304.

The previous prime is 18222779. The next prime is 18222791. The reversal of 18222790 is 9722281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222791) by changing a digit.

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, 12057 + ... + 13483.

It is an arithmetic number, because the mean of its divisors is an integer number (2053107).

Almost surely, 2^18222790 is an apocalyptic number.

18222790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18222790 is a deficient number, since it is larger than the sum of its proper divisors (14626922).

18222790 is a wasteful number, since it uses less digits than its factorization.

18222790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18222790 is about 4268.8159950975. The cubic root of 18222790 is about 263.1509588418.

The spelling of 18222790 in words is "eighteen million, two hundred twenty-two thousand, seven hundred ninety".