21822697832 has 16 divisors (see below), whose sum is σ = 44065063140. Its totient is φ = 10072014336.

The previous prime is 21822697807. The next prime is 21822697847. The reversal of 21822697832 is 23879622812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15283387876 + 6539309956 = 123626^2 + 80866^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104916713 + ... + 104916920.

Almost surely, 2^21822697832 is an apocalyptic number.

It is an amenable number.

21822697832 is an abundant number, since it is smaller than the sum of its proper divisors (22242365308).

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

21822697832 is a wasteful number, since it uses less digits than its factorization.

21822697832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209833652 (or 209833648 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The spelling of 21822697832 in words is "twenty-one billion, eight hundred twenty-two million, six hundred ninety-seven thousand, eight hundred thirty-two".