20303003110991 has 2 divisors, whose sum is σ = 20303003110992. Its totient is φ = 20303003110990.

The previous prime is 20303003110963. The next prime is 20303003111047. The reversal of 20303003110991 is 19901130030302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20303003110991 - 2¹⁰ = 20303003109967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20303003140991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151501555495 + 10151501555496.

It is an arithmetic number, because the mean of its divisors is an integer number (10151501555496).

Almost surely, 2^{20303003110991} is an apocalyptic number.

20303003110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303003110991 is an equidigital number, since it uses as much as digits as its factorization.

20303003110991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The spelling of 20303003110991 in words is "twenty trillion, three hundred three billion, three million, one hundred ten thousand, nine hundred ninety-one".