20310300991 has 2 divisors, whose sum is σ = 20310300992. Its totient is φ = 20310300990.

The previous prime is 20310300953. The next prime is 20310301027. The reversal of 20310300991 is 19900301302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20310300991 - 2¹³ = 20310292799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310300691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155150495 + 10155150496.

It is an arithmetic number, because the mean of its divisors is an integer number (10155150496).

Almost surely, 2^20310300991 is an apocalyptic number.

20310300991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310300991 is an equidigital number, since it uses as much as digits as its factorization.

20310300991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The spelling of 20310300991 in words is "twenty billion, three hundred ten million, three hundred thousand, nine hundred ninety-one".