18090622 has 32 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 7701120.

The previous prime is 18090617. The next prime is 18090623. The reversal of 18090622 is 22609081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090623) 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 15 ways as a sum of consecutive naturals, for example, 47043 + ... + 47425.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^18090622 is an apocalyptic number.

18090622 is a deficient number, since it is larger than the sum of its proper divisors (13428098).

18090622 is a wasteful number, since it uses less digits than its factorization.

18090622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18090622 is about 4253.3071838277. The cubic root of 18090622 is about 262.5132123357.

The spelling of 18090622 in words is "eighteen million, ninety thousand, six hundred twenty-two".