21423424683343 has 2 divisors, whose sum is σ = 21423424683344. Its totient is φ = 21423424683342.

The previous prime is 21423424683293. The next prime is 21423424683413. The reversal of 21423424683343 is 34338642432412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21423424683343 - 2¹³ = 21423424675151 is a prime.

It is a super-4 number, since 4×21423424683343⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21423424681343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711712341671 + 10711712341672.

It is an arithmetic number, because the mean of its divisors is an integer number (10711712341672).

Almost surely, 2^{21423424683343} is an apocalyptic number.

21423424683343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423424683343 is an equidigital number, since it uses as much as digits as its factorization.

21423424683343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7962624, while the sum is 49.

The spelling of 21423424683343 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, six hundred eighty-three thousand, three hundred forty-three".