21423404014013 has 2 divisors, whose sum is σ = 21423404014014. Its totient is φ = 21423404014012.

The previous prime is 21423404014003. The next prime is 21423404014093. The reversal of 21423404014013 is 31041040432412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20083465805764 + 1339938208249 = 4481458^2 + 1157557^2 .

It is a cyclic number.

It is not a de Polignac number, because 21423404014013 - 2⁸ = 21423404013757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21423404014003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711702007006 + 10711702007007.

It is an arithmetic number, because the mean of its divisors is an integer number (10711702007007).

Almost surely, 2^{21423404014013} is an apocalyptic number.

It is an amenable number.

21423404014013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423404014013 is an equidigital number, since it uses as much as digits as its factorization.

21423404014013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21423404014013 its reverse (31041040432412), we get a palindrome (52464444446425).

The spelling of 21423404014013 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred four million, fourteen thousand, thirteen".