21968273347 has 8 divisors (see below), whose sum is σ = 23258169360. Its totient is φ = 20691744480.

The previous prime is 21968273339. The next prime is 21968273363. The reversal of 21968273347 is 74337286912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21968273347 - 2³ = 21968273339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21968273294 and 21968273303.

It is not an unprimeable number, because it can be changed into a prime (21968273317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3338404 + ... + 3344977.

It is an arithmetic number, because the mean of its divisors is an integer number (2907271170).

Almost surely, 2^21968273347 is an apocalyptic number.

21968273347 is a deficient number, since it is larger than the sum of its proper divisors (1289896013).

21968273347 is a wasteful number, since it uses less digits than its factorization.

21968273347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683573.

The product of its digits is 3048192, while the sum is 52.

The spelling of 21968273347 in words is "twenty-one billion, nine hundred sixty-eight million, two hundred seventy-three thousand, three hundred forty-seven".