20041247137777 has 2 divisors, whose sum is σ = 20041247137778. Its totient is φ = 20041247137776.

The previous prime is 20041247137697. The next prime is 20041247137817. The reversal of 20041247137777 is 77773174214002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13109316421041 + 6931930716736 = 3620679^2 + 2632856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20041247137777 is a prime.

It is not a weakly prime, because it can be changed into another prime (20041247137277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020623568888 + 10020623568889.

It is an arithmetic number, because the mean of its divisors is an integer number (10020623568889).

Almost surely, 2^{20041247137777} is an apocalyptic number.

It is an amenable number.

20041247137777 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041247137777 is an equidigital number, since it uses as much as digits as its factorization.

20041247137777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3226944, while the sum is 52.

The spelling of 20041247137777 in words is "twenty trillion, forty-one billion, two hundred forty-seven million, one hundred thirty-seven thousand, seven hundred seventy-seven".