21302444033244 has 144 divisors (see below), whose sum is σ = 62255821694976. Its totient is φ = 6069971980800.

The previous prime is 21302444033219. The next prime is 21302444033279. The reversal of 21302444033244 is 44233044420312.

21302444033244 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 2 + 4 + 4 + 403 + 3 + 244 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21302444033199 and 21302444033208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5862139 + ... + 8773229.

It is an arithmetic number, because the mean of its divisors is an integer number (432332095104).

Almost surely, 2^{21302444033244} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21302444033244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31127910847488).

21302444033244 is an abundant number, since it is smaller than the sum of its proper divisors (40953377661732).

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

21302444033244 is a wasteful number, since it uses less digits than its factorization.

21302444033244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912216 (or 2912211 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 21302444033244 its reverse (44233044420312), we get a palindrome (65535488453556).

The spelling of 21302444033244 in words is "twenty-one trillion, three hundred two billion, four hundred forty-four million, thirty-three thousand, two hundred forty-four".