21423312332993 has 2 divisors, whose sum is σ = 21423312332994. Its totient is φ = 21423312332992.

The previous prime is 21423312332977. The next prime is 21423312333029. The reversal of 21423312332993 is 39923321332412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16819743011344 + 4603569321649 = 4101188^2 + 2145593^2 .

It is a cyclic number.

It is not a de Polignac number, because 21423312332993 - 2⁴ = 21423312332977 is a prime.

It is a super-2 number, since 2×21423312332993² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21423312337993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711656166496 + 10711656166497.

It is an arithmetic number, because the mean of its divisors is an integer number (10711656166497).

Almost surely, 2^{21423312332993} is an apocalyptic number.

It is an amenable number.

21423312332993 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423312332993 is an equidigital number, since it uses as much as digits as its factorization.

21423312332993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 47.

The spelling of 21423312332993 in words is "twenty-one trillion, four hundred twenty-three billion, three hundred twelve million, three hundred thirty-two thousand, nine hundred ninety-three".