21443433023 has 2 divisors, whose sum is σ = 21443433024. Its totient is φ = 21443433022.

The previous prime is 21443433007. The next prime is 21443433031. The reversal of 21443433023 is 32033434412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21443433023 - 2⁴ = 21443433007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21443433073) 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 as a sum of consecutive naturals, namely, 10721716511 + 10721716512.

It is an arithmetic number, because the mean of its divisors is an integer number (10721716512).

Almost surely, 2^21443433023 is an apocalyptic number.

21443433023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21443433023 is an equidigital number, since it uses as much as digits as its factorization.

21443433023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 21443433023 its reverse (32033434412), we get a palindrome (53476867435).

The spelling of 21443433023 in words is "twenty-one billion, four hundred forty-three million, four hundred thirty-three thousand, twenty-three".