21344203967 has 2 divisors, whose sum is σ = 21344203968. Its totient is φ = 21344203966.

The previous prime is 21344203939. The next prime is 21344203973. The reversal of 21344203967 is 76930244312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21344203967 - 2¹² = 21344199871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344203997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672101983 + 10672101984.

It is an arithmetic number, because the mean of its divisors is an integer number (10672101984).

Almost surely, 2^21344203967 is an apocalyptic number.

21344203967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344203967 is an equidigital number, since it uses as much as digits as its factorization.

21344203967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 21344203967 in words is "twenty-one billion, three hundred forty-four million, two hundred three thousand, nine hundred sixty-seven".