21244410254320 has 40 divisors (see below), whose sum is σ = 53883549647280. Its totient is φ = 7725240092160.

The previous prime is 21244410254303. The next prime is 21244410254363. The reversal of 21244410254320 is 2345201444212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12070686765 + ... + 12070688524.

It is an arithmetic number, because the mean of its divisors is an integer number (1347088741182).

Almost surely, 2^{21244410254320} is an apocalyptic number.

21244410254320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21244410254320 is an abundant number, since it is smaller than the sum of its proper divisors (32639139392960).

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

21244410254320 is a wasteful number, since it uses less digits than its factorization.

21244410254320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24141375313 (or 24141375307 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 21244410254320 its reverse (2345201444212), we get a palindrome (23589611698532).

The spelling of 21244410254320 in words is "twenty-one trillion, two hundred forty-four billion, four hundred ten million, two hundred fifty-four thousand, three hundred twenty".