18022771 has 8 divisors (see below), whose sum is σ = 20551104. Its totient is φ = 15657600.

The previous prime is 18022757. The next prime is 18022787. The reversal of 18022771 is 17722081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18022771 - 2⁷ = 18022643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18022171) 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, 40555 + ... + 40996.

It is an arithmetic number, because the mean of its divisors is an integer number (2568888).

Almost surely, 2^18022771 is an apocalyptic number.

18022771 is a deficient number, since it is larger than the sum of its proper divisors (2528333).

18022771 is a wasteful number, since it uses less digits than its factorization.

18022771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81581.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 18022771 is about 4245.3234270194. The cubic root of 18022771 is about 262.1846056340.

The spelling of 18022771 in words is "eighteen million, twenty-two thousand, seven hundred seventy-one".