21823808943 has 8 divisors (see below), whose sum is σ = 29808129456. Its totient is φ = 14194347200.

The previous prime is 21823808879. The next prime is 21823808969. The reversal of 21823808943 is 34980832812.

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 21823808943 - 2⁶ = 21823808879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21823808892 and 21823808901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21823808983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88714548 + ... + 88714793.

It is an arithmetic number, because the mean of its divisors is an integer number (3726016182).

Almost surely, 2^21823808943 is an apocalyptic number.

21823808943 is a deficient number, since it is larger than the sum of its proper divisors (7984320513).

21823808943 is a wasteful number, since it uses less digits than its factorization.

21823808943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177429385.

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 21823808943 in words is "twenty-one billion, eight hundred twenty-three million, eight hundred eight thousand, nine hundred forty-three".