20001199496813 has 2 divisors, whose sum is σ = 20001199496814. Its totient is φ = 20001199496812.

The previous prime is 20001199496779. The next prime is 20001199496881. The reversal of 20001199496813 is 31869499110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19918708189444 + 82491307369 = 4463038^2 + 287213^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001199496813 - 2²⁶ = 20001132387949 is a prime.

It is a super-2 number, since 2×20001199496813² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001199493813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000599748406 + 10000599748407.

It is an arithmetic number, because the mean of its divisors is an integer number (10000599748407).

Almost surely, 2^{20001199496813} is an apocalyptic number.

It is an amenable number.

20001199496813 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001199496813 is an equidigital number, since it uses as much as digits as its factorization.

20001199496813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 53.

The spelling of 20001199496813 in words is "twenty trillion, one billion, one hundred ninety-nine million, four hundred ninety-six thousand, eight hundred thirteen".