21850573343 has 4 divisors (see below), whose sum is σ = 21851377368. Its totient is φ = 21849769320.

The previous prime is 21850573337. The next prime is 21850573351. The reversal of 21850573343 is 34337505812.

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 21850573343 - 2¹⁶ = 21850507807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21850573343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21850573313) by changing a digit.

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, 359768 + ... + 416093.

It is an arithmetic number, because the mean of its divisors is an integer number (5462844342).

Almost surely, 2^21850573343 is an apocalyptic number.

21850573343 is a deficient number, since it is larger than the sum of its proper divisors (804025).

21850573343 is an equidigital number, since it uses as much as digits as its factorization.

21850573343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804024.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 21850573343 in words is "twenty-one billion, eight hundred fifty million, five hundred seventy-three thousand, three hundred forty-three".