22013212340 has 96 divisors (see below), whose sum is σ = 54016671744. Its totient is φ = 7378473600.

The previous prime is 22013212339. The next prime is 22013212367. The reversal of 22013212340 is 4321231022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9362165 + ... + 9364515.

It is an arithmetic number, because the mean of its divisors is an integer number (562673664).

Almost surely, 2^22013212340 is an apocalyptic number.

22013212340 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 22013212340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27008335872).

22013212340 is an abundant number, since it is smaller than the sum of its proper divisors (32003459404).

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

22013212340 is a wasteful number, since it uses less digits than its factorization.

22013212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3835 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22013212340 its reverse (4321231022), we get a palindrome (26334443362).

The spelling of 22013212340 in words is "twenty-two billion, thirteen million, two hundred twelve thousand, three hundred forty".