21968233267 has 4 divisors (see below), whose sum is σ = 21969117360. Its totient is φ = 21967349176.

The previous prime is 21968233253. The next prime is 21968233277. The reversal of 21968233267 is 76233286912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21968233267 is a prime.

It is a super-3 number, since 3×21968233267³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21968233267.

It is not an unprimeable number, because it can be changed into a prime (21968233277) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 403663 + ... + 454840.

It is an arithmetic number, because the mean of its divisors is an integer number (5492279340).

Almost surely, 2^21968233267 is an apocalyptic number.

21968233267 is a deficient number, since it is larger than the sum of its proper divisors (884093).

21968233267 is an equidigital number, since it uses as much as digits as its factorization.

21968233267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884092.

The product of its digits is 1306368, while the sum is 49.

The spelling of 21968233267 in words is "twenty-one billion, nine hundred sixty-eight million, two hundred thirty-three thousand, two hundred sixty-seven".