18022775 has 12 divisors (see below), whose sum is σ = 23119800. Its totient is φ = 13920480.

The previous prime is 18022757. The next prime is 18022787. The reversal of 18022775 is 57722081.

It is not a de Polignac number, because 18022775 - 2¹⁶ = 17957239 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11705 + ... + 13154.

It is an arithmetic number, because the mean of its divisors is an integer number (1926650).

Almost surely, 2^18022775 is an apocalyptic number.

18022775 is a deficient number, since it is larger than the sum of its proper divisors (5097025).

18022775 is a wasteful number, since it uses less digits than its factorization.

18022775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24898 (or 24893 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 18022775 is about 4245.3238981260. The cubic root of 18022775 is about 262.1846250306.

The spelling of 18022775 in words is "eighteen million, twenty-two thousand, seven hundred seventy-five".