21304222043 has 8 divisors (see below), whose sum is σ = 22992782736. Its totient is φ = 19622772000.

The previous prime is 21304222033. The next prime is 21304222099. The reversal of 21304222043 is 34022240312.

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

It is not a de Polignac number, because 21304222043 - 2¹⁸ = 21303959899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21304222003) 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, 1771433 + ... + 1783418.

It is an arithmetic number, because the mean of its divisors is an integer number (2874097842).

Almost surely, 2^21304222043 is an apocalyptic number.

21304222043 is a deficient number, since it is larger than the sum of its proper divisors (1688560693).

21304222043 is a wasteful number, since it uses less digits than its factorization.

21304222043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555325.

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

Adding to 21304222043 its reverse (34022240312), we get a palindrome (55326462355).

The spelling of 21304222043 in words is "twenty-one billion, three hundred four million, two hundred twenty-two thousand, forty-three".