20512112004977 has 2 divisors, whose sum is σ = 20512112004978. Its totient is φ = 20512112004976.

The previous prime is 20512112004959. The next prime is 20512112005039. The reversal of 20512112004977 is 77940021121502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19708263481201 + 803848523776 = 4439399^2 + 896576^2 .

It is a cyclic number.

It is not a de Polignac number, because 20512112004977 - 2¹⁰ = 20512112003953 is a prime.

It is not a weakly prime, because it can be changed into another prime (20512112004677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256056002488 + 10256056002489.

It is an arithmetic number, because the mean of its divisors is an integer number (10256056002489).

Almost surely, 2^{20512112004977} is an apocalyptic number.

It is an amenable number.

20512112004977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512112004977 is an equidigital number, since it uses as much as digits as its factorization.

20512112004977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 20512112004977 in words is "twenty trillion, five hundred twelve billion, one hundred twelve million, four thousand, nine hundred seventy-seven".