21852851323 has 4 divisors (see below), whose sum is σ = 21863929248. Its totient is φ = 21841773400.

The previous prime is 21852851303. The next prime is 21852851347. The reversal of 21852851323 is 32315825812.

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-21852851323 is a prime.

It is a super-2 number, since 2×21852851323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21852851303) 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, 5536003 + ... + 5539948.

It is an arithmetic number, because the mean of its divisors is an integer number (5465982312).

Almost surely, 2^21852851323 is an apocalyptic number.

21852851323 is a deficient number, since it is larger than the sum of its proper divisors (11077925).

21852851323 is a wasteful number, since it uses less digits than its factorization.

21852851323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077924.

The product of its digits is 115200, while the sum is 40.

The spelling of 21852851323 in words is "twenty-one billion, eight hundred fifty-two million, eight hundred fifty-one thousand, three hundred twenty-three".