22156040055320 has 64 divisors (see below), whose sum is σ = 50923808611200. Its totient is φ = 8671799825920.

The previous prime is 22156040055313. The next prime is 22156040055323. The reversal of 22156040055320 is 2355004065122.

It is a super-2 number, since 2×22156040055320² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156040055323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6557150 + ... + 9343890.

It is an arithmetic number, because the mean of its divisors is an integer number (795684509550).

Almost surely, 2^{22156040055320} is an apocalyptic number.

22156040055320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22156040055320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25461904305600).

22156040055320 is an abundant number, since it is smaller than the sum of its proper divisors (28767768555880).

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

22156040055320 is a wasteful number, since it uses less digits than its factorization.

22156040055320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791028 (or 2791024 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 22156040055320 in words is "twenty-two trillion, one hundred fifty-six billion, forty million, fifty-five thousand, three hundred twenty".