20424002420191 has 2 divisors, whose sum is σ = 20424002420192. Its totient is φ = 20424002420190.

The previous prime is 20424002420111. The next prime is 20424002420231. The reversal of 20424002420191 is 19102420042402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20424002420191 - 2⁹ = 20424002419679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424002420111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212001210095 + 10212001210096.

It is an arithmetic number, because the mean of its divisors is an integer number (10212001210096).

Almost surely, 2^{20424002420191} is an apocalyptic number.

20424002420191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424002420191 is an equidigital number, since it uses as much as digits as its factorization.

20424002420191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 20424002420191 its reverse (19102420042402), we get a palindrome (39526422462593).

The spelling of 20424002420191 in words is "twenty trillion, four hundred twenty-four billion, two million, four hundred twenty thousand, one hundred ninety-one".