22218364 has 18 divisors (see below), whose sum is σ = 45230640. Its totient is φ = 9522072.

The previous prime is 22218349. The next prime is 22218373. The reversal of 22218364 is 46381222.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56484 + ... + 56875.

Almost surely, 2^22218364 is an apocalyptic number.

It is an amenable number.

22218364 is an abundant number, since it is smaller than the sum of its proper divisors (23012276).

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

22218364 is a wasteful number, since it uses less digits than its factorization.

22218364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113377 (or 113368 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 22218364 is about 4713.6359638818. The cubic root of 22218364 is about 281.1279500723.

Adding to 22218364 its reverse (46381222), we get a palindrome (68599586).

It can be divided in two parts, 2221 and 8364, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 22218364 in words is "twenty-two million, two hundred eighteen thousand, three hundred sixty-four".