22991109210 has 72 divisors (see below), whose sum is σ = 61436469276. Its totient is φ = 5965228800.

The previous prime is 22991109191. The next prime is 22991109217. The reversal of 22991109210 is 1290119922.

It can be written as a sum of positive squares in 6 ways, for example, as 21643411689 + 1347697521 = 147117^2 + 36711^2 .

It is a super-2 number, since 2×22991109210² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22991109217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29910 + ... + 216510.

Almost surely, 2^22991109210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22991109210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30718234638).

22991109210 is an abundant number, since it is smaller than the sum of its proper divisors (38445360066).

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

22991109210 is a wasteful number, since it uses less digits than its factorization.

22991109210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186688 (or 186648 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 22991109210 in words is "twenty-two billion, nine hundred ninety-one million, one hundred nine thousand, two hundred ten".