20200202591 has 2 divisors, whose sum is σ = 20200202592. Its totient is φ = 20200202590.

The previous prime is 20200202573. The next prime is 20200202669. The reversal of 20200202591 is 19520200202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20200202591 is a prime.

It is a super-2 number, since 2×20200202591² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200202291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100101295 + 10100101296.

It is an arithmetic number, because the mean of its divisors is an integer number (10100101296).

Almost surely, 2^20200202591 is an apocalyptic number.

20200202591 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200202591 is an equidigital number, since it uses as much as digits as its factorization.

20200202591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 20200202591 its reverse (19520200202), we get a palindrome (39720402793).

The spelling of 20200202591 in words is "twenty billion, two hundred million, two hundred two thousand, five hundred ninety-one".