18022955 has 4 divisors (see below), whose sum is σ = 21627552. Its totient is φ = 14418360.

The previous prime is 18022943. The next prime is 18022957. The reversal of 18022955 is 55922081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55922081 = 659 ⋅84859.

It is not a de Polignac number, because 18022955 - 2¹⁸ = 17760811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18022957) 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, 1802291 + ... + 1802300.

It is an arithmetic number, because the mean of its divisors is an integer number (5406888).

Almost surely, 2^18022955 is an apocalyptic number.

18022955 is a deficient number, since it is larger than the sum of its proper divisors (3604597).

18022955 is an equidigital number, since it uses as much as digits as its factorization.

18022955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604596.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 18022955 is about 4245.3450978690. The cubic root of 18022955 is about 262.1854978720.

The spelling of 18022955 in words is "eighteen million, twenty-two thousand, nine hundred fifty-five".