21343307744 has 96 divisors (see below), whose sum is σ = 46626233472. Its totient is φ = 9535680000.

The previous prime is 21343307737. The next prime is 21343307771. The reversal of 21343307744 is 44770334312.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21343307698 and 21343307707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16531739 + ... + 16533029.

It is an arithmetic number, because the mean of its divisors is an integer number (485689932).

Almost surely, 2^21343307744 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 21343307744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23313116736).

21343307744 is an abundant number, since it is smaller than the sum of its proper divisors (25282925728).

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

21343307744 is a wasteful number, since it uses less digits than its factorization.

21343307744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080 (or 2072 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 38.

The spelling of 21343307744 in words is "twenty-one billion, three hundred forty-three million, three hundred seven thousand, seven hundred forty-four".