22939952640 has 640 divisors, whose sum is σ = 84639582720. Its totient is φ = 5249433600.

The previous prime is 22939952639. The next prime is 22939952641. The reversal of 22939952640 is 4625993922.

It is an interprime number because it is at equal distance from previous prime (22939952639) and next prime (22939952641).

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22939952641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128156071 + ... + 128156249.

It is an arithmetic number, because the mean of its divisors is an integer number (132249348).

Almost surely, 2^22939952640 is an apocalyptic number.

22939952640 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 22939952640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42319791360).

22939952640 is an abundant number, since it is smaller than the sum of its proper divisors (61699630080).

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

22939952640 is a wasteful number, since it uses less digits than its factorization.

22939952640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 51.

It can be divided in two parts, 22939 and 952640, that added together give a palindrome (975579).

The spelling of 22939952640 in words is "twenty-two billion, nine hundred thirty-nine million, nine hundred fifty-two thousand, six hundred forty".