21719792343 has 4 divisors (see below), whose sum is σ = 28959723128. Its totient is φ = 14479861560.

The previous prime is 21719792321. The next prime is 21719792357. The reversal of 21719792343 is 34329791712.

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

It is not a de Polignac number, because 21719792343 - 2⁶ = 21719792279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21719792292 and 21719792301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21719792383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3619965388 + ... + 3619965393.

It is an arithmetic number, because the mean of its divisors is an integer number (7239930782).

Almost surely, 2^21719792343 is an apocalyptic number.

21719792343 is a deficient number, since it is larger than the sum of its proper divisors (7239930785).

21719792343 is an equidigital number, since it uses as much as digits as its factorization.

21719792343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239930784.

The product of its digits is 571536, while the sum is 48.

The spelling of 21719792343 in words is "twenty-one billion, seven hundred nineteen million, seven hundred ninety-two thousand, three hundred forty-three".