21434102314423 has 2 divisors, whose sum is σ = 21434102314424. Its totient is φ = 21434102314422.

The previous prime is 21434102314403. The next prime is 21434102314507. The reversal of 21434102314423 is 32441320143412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21434102314423 - 2²⁵ = 21434068759991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21434102314403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10717051157211 + 10717051157212.

It is an arithmetic number, because the mean of its divisors is an integer number (10717051157212).

Almost surely, 2^{21434102314423} is an apocalyptic number.

21434102314423 is a deficient number, since it is larger than the sum of its proper divisors (1).

21434102314423 is an equidigital number, since it uses as much as digits as its factorization.

21434102314423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 21434102314423 its reverse (32441320143412), we get a palindrome (53875422457835).

The spelling of 21434102314423 in words is "twenty-one trillion, four hundred thirty-four billion, one hundred two million, three hundred fourteen thousand, four hundred twenty-three".