21323000330993 has 2 divisors, whose sum is σ = 21323000330994. Its totient is φ = 21323000330992.

The previous prime is 21323000330963. The next prime is 21323000331049. The reversal of 21323000330993 is 39903300032312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18588713200369 + 2734287130624 = 4311463^2 + 1653568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323000330993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21323000330963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661500165496 + 10661500165497.

It is an arithmetic number, because the mean of its divisors is an integer number (10661500165497).

Almost surely, 2^{21323000330993} is an apocalyptic number.

It is an amenable number.

21323000330993 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323000330993 is an equidigital number, since it uses as much as digits as its factorization.

21323000330993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 38.

The spelling of 21323000330993 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty thousand, nine hundred ninety-three".