21344422193 has 2 divisors, whose sum is σ = 21344422194. Its totient is φ = 21344422192.

The previous prime is 21344422181. The next prime is 21344422207. The reversal of 21344422193 is 39122444312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17793692449 + 3550729744 = 133393^2 + 59588^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344422193 - 2¹⁰ = 21344421169 is a prime.

It is a super-3 number, since 3×21344422193³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21344422123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672211096 + 10672211097.

It is an arithmetic number, because the mean of its divisors is an integer number (10672211097).

Almost surely, 2^21344422193 is an apocalyptic number.

It is an amenable number.

21344422193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344422193 is an equidigital number, since it uses as much as digits as its factorization.

21344422193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 35.

The spelling of 21344422193 in words is "twenty-one billion, three hundred forty-four million, four hundred twenty-two thousand, one hundred ninety-three".