21022020332244 has 72 divisors (see below), whose sum is σ = 54984342372960. Its totient is φ = 6764111710272.

The previous prime is 21022020332221. The next prime is 21022020332317. The reversal of 21022020332244 is 44223302022012.

21022020332244 is a `hidden beast` number, since 2 + 10 + 220 + 203 + 3 + 224 + 4 = 666.

It is a super-2 number, since 2×21022020332244² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2056839 + ... + 6802545.

Almost surely, 2^{21022020332244} is an apocalyptic number.

It is an amenable number.

21022020332244 is an abundant number, since it is smaller than the sum of its proper divisors (33962322040716).

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

21022020332244 is a wasteful number, since it uses less digits than its factorization.

21022020332244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749989 (or 4749984 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21022020332244 its reverse (44223302022012), we get a palindrome (65245322354256).

The spelling of 21022020332244 in words is "twenty-one trillion, twenty-two billion, twenty million, three hundred thirty-two thousand, two hundred forty-four".