21433143373 has 2 divisors, whose sum is σ = 21433143374. Its totient is φ = 21433143372.

The previous prime is 21433143367. The next prime is 21433143451. The reversal of 21433143373 is 37334133412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21335568489 + 97574884 = 146067^2 + 9878^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433143373 - 2⁵ = 21433143341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21433143353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716571686 + 10716571687.

It is an arithmetic number, because the mean of its divisors is an integer number (10716571687).

Almost surely, 2^21433143373 is an apocalyptic number.

It is an amenable number.

21433143373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433143373 is an equidigital number, since it uses as much as digits as its factorization.

21433143373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 34.

Adding to 21433143373 its reverse (37334133412), we get a palindrome (58767276785).

The spelling of 21433143373 in words is "twenty-one billion, four hundred thirty-three million, one hundred forty-three thousand, three hundred seventy-three".