21343746976 has 96 divisors (see below), whose sum is σ = 47151720000. Its totient is φ = 9450934272.

The previous prime is 21343746967. The next prime is 21343747049. The reversal of 21343746976 is 67964734312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533135 + ... + 1546993.

It is an arithmetic number, because the mean of its divisors is an integer number (491163750).

Almost surely, 2^21343746976 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 21343746976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23575860000).

21343746976 is an abundant number, since it is smaller than the sum of its proper divisors (25807973024).

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

21343746976 is a wasteful number, since it uses less digits than its factorization.

21343746976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14054 (or 14046 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 52.

The spelling of 21343746976 in words is "twenty-one billion, three hundred forty-three million, seven hundred forty-six thousand, nine hundred seventy-six".