22111380 has 60 divisors (see below), whose sum is σ = 69369300. Its totient is φ = 5895936.

The previous prime is 22111363. The next prime is 22111387. The reversal of 22111380 is 8311122.

It can be written as a sum of positive squares in 2 ways, for example, as 4822416 + 17288964 = 2196^2 + 4158^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111387) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5205 + ... + 8444.

It is an arithmetic number, because the mean of its divisors is an integer number (1156155).

Almost surely, 2^22111380 is an apocalyptic number.

22111380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111380 is an abundant number, since it is smaller than the sum of its proper divisors (47257920).

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

22111380 is a wasteful number, since it uses less digits than its factorization.

22111380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13670 (or 13659 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 22111380 is about 4702.2739180103. The cubic root of 22111380 is about 280.6760026709.

The spelling of 22111380 in words is "twenty-two million, one hundred eleven thousand, three hundred eighty".