21313330319923 has 2 divisors, whose sum is σ = 21313330319924. Its totient is φ = 21313330319922.

The previous prime is 21313330319899. The next prime is 21313330320097. The reversal of 21313330319923 is 32991303331312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313330319923 - 2²⁹ = 21312793449011 is a prime.

It is a super-2 number, since 2×21313330319923² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21313330319923.

It is not a weakly prime, because it can be changed into another prime (21313330313923) 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, 10656665159961 + 10656665159962.

It is an arithmetic number, because the mean of its divisors is an integer number (10656665159962).

Almost surely, 2^{21313330319923} is an apocalyptic number.

21313330319923 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313330319923 is an equidigital number, since it uses as much as digits as its factorization.

21313330319923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 43.

The spelling of 21313330319923 in words is "twenty-one trillion, three hundred thirteen billion, three hundred thirty million, three hundred nineteen thousand, nine hundred twenty-three".