22213052640 has 144 divisors (see below), whose sum is σ = 75840710400. Its totient is φ = 5920459776.

The previous prime is 22213052639. The next prime is 22213052681. The reversal of 22213052640 is 4625031222.

It is a happy number.

22213052640 is a `hidden beast` number, since 2 + 2 + 2 + 13 + 0 + 5 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5338881 + ... + 5343039.

It is an arithmetic number, because the mean of its divisors is an integer number (526671600).

Almost surely, 2^22213052640 is an apocalyptic number.

22213052640 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 22213052640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37920355200).

22213052640 is an abundant number, since it is smaller than the sum of its proper divisors (53627657760).

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

22213052640 is a wasteful number, since it uses less digits than its factorization.

22213052640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7889 (or 7878 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 22213052640 its reverse (4625031222), we get a palindrome (26838083862).

The spelling of 22213052640 in words is "twenty-two billion, two hundred thirteen million, fifty-two thousand, six hundred forty".