22218680 has 32 divisors (see below), whose sum is σ = 54537840. Its totient is φ = 8079360.

The previous prime is 22218649. The next prime is 22218683. The reversal of 22218680 is 8681222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22218683) 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, 24809 + ... + 25688.

Almost surely, 2^22218680 is an apocalyptic number.

22218680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22218680 is an abundant number, since it is smaller than the sum of its proper divisors (32319160).

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

22218680 is a wasteful number, since it uses less digits than its factorization.

22218680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50519 (or 50515 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 22218680 is about 4713.6694835340. The cubic root of 22218680 is about 281.1292828438.

It can be divided in two parts, 2221 and 8680, that added together give a palindrome (10901).

The spelling of 22218680 in words is "twenty-two million, two hundred eighteen thousand, six hundred eighty".