21363373399 has 2 divisors, whose sum is σ = 21363373400. Its totient is φ = 21363373398.

The previous prime is 21363373397. The next prime is 21363373513. The reversal of 21363373399 is 99337336312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21363373399 - 2¹ = 21363373397 is a prime.

Together with 21363373397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21363373397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10681686699 + 10681686700.

It is an arithmetic number, because the mean of its divisors is an integer number (10681686700).

Almost surely, 2^21363373399 is an apocalyptic number.

21363373399 is a deficient number, since it is larger than the sum of its proper divisors (1).

21363373399 is an equidigital number, since it uses as much as digits as its factorization.

21363373399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 49.

The spelling of 21363373399 in words is "twenty-one billion, three hundred sixty-three million, three hundred seventy-three thousand, three hundred ninety-nine".