21532091869722 has 16 divisors (see below), whose sum is σ = 49216209988032. Its totient is φ = 6152026248480.

The previous prime is 21532091869721. The next prime is 21532091869789. The reversal of 21532091869722 is 22796819023512.

It is a super-2 number, since 2×21532091869722² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21532091869721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256334426979 + ... + 256334427062.

It is an arithmetic number, because the mean of its divisors is an integer number (3076013124252).

Almost surely, 2^{21532091869722} is an apocalyptic number.

21532091869722 is an abundant number, since it is smaller than the sum of its proper divisors (27684118118310).

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

21532091869722 is a wasteful number, since it uses less digits than its factorization.

21532091869722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512668854053.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 21532091869722 in words is "twenty-one trillion, five hundred thirty-two billion, ninety-one million, eight hundred sixty-nine thousand, seven hundred twenty-two".