21572833877140 has 72 divisors (see below), whose sum is σ = 56753147617992. Its totient is φ = 6827446321920.

The previous prime is 21572833877129. The next prime is 21572833877149. The reversal of 21572833877140 is 4177833827512.

It can be written as a sum of positive squares in 4 ways, for example, as 163316207376 + 21409517669764 = 404124^2 + 4627042^2 .

It is a super-2 number, since 2×21572833877140² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21572833877149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 846644791 + ... + 846670270.

It is an arithmetic number, because the mean of its divisors is an integer number (788238161361).

Almost surely, 2^{21572833877140} is an apocalyptic number.

21572833877140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21572833877140 is an abundant number, since it is smaller than the sum of its proper divisors (35180313740852).

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

21572833877140 is a wasteful number, since it uses less digits than its factorization.

21572833877140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693315097 (or 1693315088 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 58.

The spelling of 21572833877140 in words is "twenty-one trillion, five hundred seventy-two billion, eight hundred thirty-three million, eight hundred seventy-seven thousand, one hundred forty".