20330111198977 has 2 divisors, whose sum is σ = 20330111198978. Its totient is φ = 20330111198976.

The previous prime is 20330111198941. The next prime is 20330111199011. The reversal of 20330111198977 is 77989111103302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19831426656001 + 498684542976 = 4453249^2 + 706176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20330111198977 is a prime.

It is not a weakly prime, because it can be changed into another prime (20330111198077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165055599488 + 10165055599489.

It is an arithmetic number, because the mean of its divisors is an integer number (10165055599489).

Almost surely, 2^{20330111198977} is an apocalyptic number.

It is an amenable number.

20330111198977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330111198977 is an equidigital number, since it uses as much as digits as its factorization.

20330111198977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 52.

The spelling of 20330111198977 in words is "twenty trillion, three hundred thirty billion, one hundred eleven million, one hundred ninety-eight thousand, nine hundred seventy-seven".