21342323005 has 16 divisors (see below), whose sum is σ = 27254977200. Its totient is φ = 15987930112.

The previous prime is 21342322979. The next prime is 21342323077. The reversal of 21342323005 is 50032324312.

It can be written as a sum of positive squares in 8 ways, for example, as 112084569 + 21230238436 = 10587^2 + 145706^2 .

It is a cyclic number.

It is not a de Polignac number, because 21342323005 - 2⁷ = 21342322877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620530 + ... + 654019.

It is an arithmetic number, because the mean of its divisors is an integer number (1703436075).

Almost surely, 2^21342323005 is an apocalyptic number.

It is an amenable number.

21342323005 is a deficient number, since it is larger than the sum of its proper divisors (5912654195).

21342323005 is a wasteful number, since it uses less digits than its factorization.

21342323005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274768.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21342323005 its reverse (50032324312), we get a palindrome (71374647317).

The spelling of 21342323005 in words is "twenty-one billion, three hundred forty-two million, three hundred twenty-three thousand, five".