20021403240413 has 2 divisors, whose sum is σ = 20021403240414. Its totient is φ = 20021403240412.

The previous prime is 20021403240383. The next prime is 20021403240431. The reversal of 20021403240413 is 31404230412002.

Together with next prime (20021403240431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13797086800249 + 6224316440164 = 3714443^2 + 2494858^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021403240413 - 2²⁰ = 20021402191837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021403270413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010701620206 + 10010701620207.

It is an arithmetic number, because the mean of its divisors is an integer number (10010701620207).

Almost surely, 2^{20021403240413} is an apocalyptic number.

It is an amenable number.

20021403240413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021403240413 is an equidigital number, since it uses as much as digits as its factorization.

20021403240413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20021403240413 its reverse (31404230412002), we get a palindrome (51425633652415).

The spelling of 20021403240413 in words is "twenty trillion, twenty-one billion, four hundred three million, two hundred forty thousand, four hundred thirteen".