20613222652264 has 256 divisors, whose sum is σ = 45296350848000. Its totient is φ = 8709562368000.

The previous prime is 20613222652171. The next prime is 20613222652313. The reversal of 20613222652264 is 46225622231602.

It is a super-2 number, since 2×20613222652264² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20613222652264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 921497272 + ... + 921519640.

It is an arithmetic number, because the mean of its divisors is an integer number (176938870500).

Almost surely, 2^{20613222652264} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20613222652264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22648175424000).

20613222652264 is an abundant number, since it is smaller than the sum of its proper divisors (24683128195736).

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

20613222652264 is a wasteful number, since it uses less digits than its factorization.

20613222652264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22620 (or 22616 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 43.

Adding to 20613222652264 its reverse (46225622231602), we get a palindrome (66838844883866).

The spelling of 20613222652264 in words is "twenty trillion, six hundred thirteen billion, two hundred twenty-two million, six hundred fifty-two thousand, two hundred sixty-four".