21022204343 has 4 divisors (see below), whose sum is σ = 24025376400. Its totient is φ = 18019032288.

The previous prime is 21022204303. The next prime is 21022204363. The reversal of 21022204343 is 34340222012.

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 21022204343 - 2¹² = 21022200247 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 (21022204303) 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, 1501586018 + ... + 1501586031.

It is an arithmetic number, because the mean of its divisors is an integer number (6006344100).

Almost surely, 2^21022204343 is an apocalyptic number.

21022204343 is a deficient number, since it is larger than the sum of its proper divisors (3003172057).

21022204343 is an equidigital number, since it uses as much as digits as its factorization.

21022204343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003172056.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21022204343 its reverse (34340222012), we get a palindrome (55362426355).

The spelling of 21022204343 in words is "twenty-one billion, twenty-two million, two hundred four thousand, three hundred forty-three".