20015045213 has 2 divisors, whose sum is σ = 20015045214. Its totient is φ = 20015045212.

The previous prime is 20015045203. The next prime is 20015045249. The reversal of 20015045213 is 31254051002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13325931844 + 6689113369 = 115438^2 + 81787^2 .

It is a cyclic number.

It is not a de Polignac number, because 20015045213 - 2²⁰ = 20013996637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20015045203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007522606 + 10007522607.

It is an arithmetic number, because the mean of its divisors is an integer number (10007522607).

Almost surely, 2^20015045213 is an apocalyptic number.

It is an amenable number.

20015045213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015045213 is an equidigital number, since it uses as much as digits as its factorization.

20015045213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20015045213 its reverse (31254051002), we get a palindrome (51269096215).

The spelling of 20015045213 in words is "twenty billion, fifteen million, forty-five thousand, two hundred thirteen".