18120822 has 16 divisors (see below), whose sum is σ = 36361200. Its totient is φ = 6020352.

The previous prime is 18120799. The next prime is 18120829. The reversal of 18120822 is 22802181.

It is a junction number, because it is equal to n+sod(n) for n = 18120792 and 18120801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18120829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947 + ... + 6702.

It is an arithmetic number, because the mean of its divisors is an integer number (2272575).

Almost surely, 2^18120822 is an apocalyptic number.

18120822 is an abundant number, since it is smaller than the sum of its proper divisors (18240378).

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

18120822 is a wasteful number, since it uses less digits than its factorization.

18120822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9967.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 18120822 is about 4256.8558819861. The cubic root of 18120822 is about 262.6592086344.

The spelling of 18120822 in words is "eighteen million, one hundred twenty thousand, eight hundred twenty-two".