21968488495 has 4 divisors (see below), whose sum is σ = 26362186200. Its totient is φ = 17574790792.

The previous prime is 21968488481. The next prime is 21968488519. The reversal of 21968488495 is 59488486912.

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

It is a cyclic number.

It is not a de Polignac number, because 21968488495 - 2⁵ = 21968488463 is a prime.

It is a super-2 number, since 2×21968488495² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 2196848845 + ... + 2196848854.

It is an arithmetic number, because the mean of its divisors is an integer number (6590546550).

Almost surely, 2^21968488495 is an apocalyptic number.

21968488495 is a deficient number, since it is larger than the sum of its proper divisors (4393697705).

21968488495 is an equidigital number, since it uses as much as digits as its factorization.

21968488495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393697704.

The product of its digits is 39813120, while the sum is 64.

The spelling of 21968488495 in words is "twenty-one billion, nine hundred sixty-eight million, four hundred eighty-eight thousand, four hundred ninety-five".