21342324401 has 4 divisors (see below), whose sum is σ = 21465690612. Its totient is φ = 21218958192.

The previous prime is 21342324373. The next prime is 21342324403. The reversal of 21342324401 is 10442324312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20757893776 + 584430625 = 144076^2 + 24175^2 .

It is a cyclic number.

It is not a de Polignac number, because 21342324401 - 2¹⁰ = 21342323377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21342324403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61682846 + ... + 61683191.

It is an arithmetic number, because the mean of its divisors is an integer number (5366422653).

Almost surely, 2^21342324401 is an apocalyptic number.

It is an amenable number.

21342324401 is a deficient number, since it is larger than the sum of its proper divisors (123366211).

21342324401 is a wasteful number, since it uses less digits than its factorization.

21342324401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123366210.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21342324401 its reverse (10442324312), we get a palindrome (31784648713).

The spelling of 21342324401 in words is "twenty-one billion, three hundred forty-two million, three hundred twenty-four thousand, four hundred one".