21822028453728 has 60 divisors (see below), whose sum is σ = 64177979522580. Its totient is φ = 7274009483712.

The previous prime is 21822028453721. The next prime is 21822028453829. The reversal of 21822028453728 is 82735482022812.

21822028453728 is a `hidden beast` number, since 2 + 1 + 8 + 2 + 2 + 0 + 2 + 84 + 537 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822028453721) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4209493638 + ... + 4209498821.

It is an arithmetic number, because the mean of its divisors is an integer number (1069632992043).

Almost surely, 2^{21822028453728} is an apocalyptic number.

It is an amenable number.

21822028453728 is an abundant number, since it is smaller than the sum of its proper divisors (42355951068852).

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

21822028453728 is an equidigital number, since it uses as much as digits as its factorization.

21822028453728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418992481 (or 8418992464 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 54.

The spelling of 21822028453728 in words is "twenty-one trillion, eight hundred twenty-two billion, twenty-eight million, four hundred fifty-three thousand, seven hundred twenty-eight".