20200191013 has 2 divisors, whose sum is σ = 20200191014. Its totient is φ = 20200191012.

The previous prime is 20200191007. The next prime is 20200191049. The reversal of 20200191013 is 31019100202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15094088164 + 5106102849 = 122858^2 + 71457^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200191013 - 2⁵ = 20200190981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200195013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100095506 + 10100095507.

It is an arithmetic number, because the mean of its divisors is an integer number (10100095507).

Almost surely, 2^20200191013 is an apocalyptic number.

It is an amenable number.

20200191013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200191013 is an equidigital number, since it uses as much as digits as its factorization.

20200191013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 20200191013 its reverse (31019100202), we get a palindrome (51219291215).

The spelling of 20200191013 in words is "twenty billion, two hundred million, one hundred ninety-one thousand, thirteen".