21749922334 has 24 divisors (see below), whose sum is σ = 38163444840. Its totient is φ = 9269312976.

The previous prime is 21749922323. The next prime is 21749922353. The reversal of 21749922334 is 43322994712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 602397 + ... + 637480.

It is an arithmetic number, because the mean of its divisors is an integer number (1590143535).

Almost surely, 2^21749922334 is an apocalyptic number.

21749922334 is a deficient number, since it is larger than the sum of its proper divisors (16413522506).

21749922334 is a wasteful number, since it uses less digits than its factorization.

21749922334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240072 (or 1240065 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The spelling of 21749922334 in words is "twenty-one billion, seven hundred forty-nine million, nine hundred twenty-two thousand, three hundred thirty-four".