20013330191 has 2 divisors, whose sum is σ = 20013330192. Its totient is φ = 20013330190.

The previous prime is 20013330187. The next prime is 20013330251. The reversal of 20013330191 is 19103331002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20013330191 - 2² = 20013330187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013330131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006665095 + 10006665096.

It is an arithmetic number, because the mean of its divisors is an integer number (10006665096).

Almost surely, 2^20013330191 is an apocalyptic number.

20013330191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013330191 is an equidigital number, since it uses as much as digits as its factorization.

20013330191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 20013330191 its reverse (19103331002), we get a palindrome (39116661193).

The spelling of 20013330191 in words is "twenty billion, thirteen million, three hundred thirty thousand, one hundred ninety-one".