22206245620 has 72 divisors (see below), whose sum is σ = 52499028456. Its totient is φ = 7842692352.

The previous prime is 22206245561. The next prime is 22206245629. The reversal of 22206245620 is 2654260222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2817911056 + 19388334564 = 53084^2 + 139242^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22206245629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56814 + ... + 218266.

It is an arithmetic number, because the mean of its divisors is an integer number (729153173).

Almost surely, 2^22206245620 is an apocalyptic number.

22206245620 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 22206245620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26249514228).

22206245620 is an abundant number, since it is smaller than the sum of its proper divisors (30292782836).

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

22206245620 is a wasteful number, since it uses less digits than its factorization.

22206245620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161521 (or 161496 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The spelling of 22206245620 in words is "twenty-two billion, two hundred six million, two hundred forty-five thousand, six hundred twenty".