22018866 has 32 divisors (see below), whose sum is σ = 47443968. Its totient is φ = 6792720.

The previous prime is 22018849. The next prime is 22018877. The reversal of 22018866 is 66881022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1705 + ... + 6851.

It is an arithmetic number, because the mean of its divisors is an integer number (1482624).

Almost surely, 2^22018866 is an apocalyptic number.

22018866 is an abundant number, since it is smaller than the sum of its proper divisors (25425102).

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

22018866 is a wasteful number, since it uses less digits than its factorization.

22018866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 22018866 is about 4692.4264512084. The cubic root of 22018866 is about 280.2840060509.

Adding to 22018866 its reverse (66881022), we get a palindrome (88899888).

The spelling of 22018866 in words is "twenty-two million, eighteen thousand, eight hundred sixty-six".