21744756107104 has 48 divisors (see below), whose sum is σ = 43542239912640. Its totient is φ = 10686465831040.

The previous prime is 21744756107033. The next prime is 21744756107147. The reversal of 21744756107104 is 40170165744712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11513499 + ... + 13268389.

It is an arithmetic number, because the mean of its divisors is an integer number (907129998180).

Almost surely, 2^{21744756107104} is an apocalyptic number.

It is an amenable number.

21744756107104 is an abundant number, since it is smaller than the sum of its proper divisors (21797483805536).

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

21744756107104 is a wasteful number, since it uses less digits than its factorization.

21744756107104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761523 (or 1761515 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 21744756107104 in words is "twenty-one trillion, seven hundred forty-four billion, seven hundred fifty-six million, one hundred seven thousand, one hundred four".