21723531383 has 8 divisors (see below), whose sum is σ = 22878904320. Its totient is φ = 20569361400.

The previous prime is 21723531371. The next prime is 21723531407. The reversal of 21723531383 is 38313532712.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21723531383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21723531343) 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, 263543 + ... + 336008.

It is an arithmetic number, because the mean of its divisors is an integer number (2859863040).

Almost surely, 2^21723531383 is an apocalyptic number.

21723531383 is a deficient number, since it is larger than the sum of its proper divisors (1155372937).

21723531383 is a wasteful number, since it uses less digits than its factorization.

21723531383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601477.

The product of its digits is 90720, while the sum is 38.

The spelling of 21723531383 in words is "twenty-one billion, seven hundred twenty-three million, five hundred thirty-one thousand, three hundred eighty-three".