20303101891 has 2 divisors, whose sum is σ = 20303101892. Its totient is φ = 20303101890.

The previous prime is 20303101879. The next prime is 20303101919. The reversal of 20303101891 is 19810130302.

It is an a-pointer prime, because the next prime (20303101919) can be obtained adding 20303101891 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20303101891 - 2¹⁵ = 20303069123 is a prime.

It is not a weakly prime, because it can be changed into another prime (20303104891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151550945 + 10151550946.

It is an arithmetic number, because the mean of its divisors is an integer number (10151550946).

Almost surely, 2^20303101891 is an apocalyptic number.

20303101891 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303101891 is an equidigital number, since it uses as much as digits as its factorization.

20303101891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 20303101891 in words is "twenty billion, three hundred three million, one hundred one thousand, eight hundred ninety-one".