21973214328 has 64 divisors (see below), whose sum is σ = 59969108640. Its totient is φ = 6668365824.

The previous prime is 21973214311. The next prime is 21973214371. The reversal of 21973214328 is 82341237912.

It is a self number, because there is not a number n which added to its sum of digits gives 21973214328.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459601 + ... + 505152.

Almost surely, 2^21973214328 is an apocalyptic number.

It is an amenable number.

21973214328 is an abundant number, since it is smaller than the sum of its proper divisors (37995894312).

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

21973214328 is a wasteful number, since it uses less digits than its factorization.

21973214328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964848 (or 964844 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The spelling of 21973214328 in words is "twenty-one billion, nine hundred seventy-three million, two hundred fourteen thousand, three hundred twenty-eight".