21443022023 has 4 divisors (see below), whose sum is σ = 21445655760. Its totient is φ = 21440388288.

The previous prime is 21443022019. The next prime is 21443022031. The reversal of 21443022023 is 32022034412.

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 21443022023 - 2² = 21443022019 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 21443022023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443022043) 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 3 ways as a sum of consecutive naturals, for example, 1304618 + ... + 1320951.

It is an arithmetic number, because the mean of its divisors is an integer number (5361413940).

Almost surely, 2^21443022023 is an apocalyptic number.

21443022023 is a deficient number, since it is larger than the sum of its proper divisors (2633737).

21443022023 is an equidigital number, since it uses as much as digits as its factorization.

21443022023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633736.

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

Adding to 21443022023 its reverse (32022034412), we get a palindrome (53465056435).

The spelling of 21443022023 in words is "twenty-one billion, four hundred forty-three million, twenty-two thousand, twenty-three".