21303262999 has 2 divisors, whose sum is σ = 21303263000. Its totient is φ = 21303262998.

The previous prime is 21303262997. The next prime is 21303263029. The reversal of 21303262999 is 99926230312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21303262999 - 2¹ = 21303262997 is a prime.

Together with 21303262997, 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 (21303262997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651631499 + 10651631500.

It is an arithmetic number, because the mean of its divisors is an integer number (10651631500).

Almost surely, 2^21303262999 is an apocalyptic number.

21303262999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303262999 is an equidigital number, since it uses as much as digits as its factorization.

21303262999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 21303262999 in words is "twenty-one billion, three hundred three million, two hundred sixty-two thousand, nine hundred ninety-nine".