21344342195 has 16 divisors (see below), whose sum is σ = 27981145440. Its totient is φ = 15501235200.

The previous prime is 21344342191. The next prime is 21344342203. The reversal of 21344342195 is 59124344312.

It is not a de Polignac number, because 21344342195 - 2² = 21344342191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21344342191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234686 + ... + 312675.

It is an arithmetic number, because the mean of its divisors is an integer number (1748821590).

Almost surely, 2^21344342195 is an apocalyptic number.

21344342195 is a deficient number, since it is larger than the sum of its proper divisors (6636803245).

21344342195 is a wasteful number, since it uses less digits than its factorization.

21344342195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548086.

The product of its digits is 103680, while the sum is 38.

The spelling of 21344342195 in words is "twenty-one billion, three hundred forty-four million, three hundred forty-two thousand, one hundred ninety-five".