22165707220 has 24 divisors (see below), whose sum is σ = 46570744584. Its totient is φ = 8861947776.

The previous prime is 22165707191. The next prime is 22165707229. The reversal of 22165707220 is 2270756122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7517930436 + 14647776784 = 86706^2 + 121028^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22165707229) 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, 228859 + ... + 310978.

It is an arithmetic number, because the mean of its divisors is an integer number (1940447691).

Almost surely, 2^22165707220 is an apocalyptic number.

22165707220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22165707220 is an abundant number, since it is smaller than the sum of its proper divisors (24405037364).

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

22165707220 is a wasteful number, since it uses less digits than its factorization.

22165707220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541899 (or 541897 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 22165707220 in words is "twenty-two billion, one hundred sixty-five million, seven hundred seven thousand, two hundred twenty".