20041476715781 has 2 divisors, whose sum is σ = 20041476715782. Its totient is φ = 20041476715780.

The previous prime is 20041476715769. The next prime is 20041476715837. The reversal of 20041476715781 is 18751767414002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13537910772100 + 6503565943681 = 3679390^2 + 2550209^2 .

It is a cyclic number.

It is not a de Polignac number, because 20041476715781 - 2¹⁰ = 20041476714757 is a prime.

It is a super-2 number, since 2×20041476715781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20041476715181) 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, 10020738357890 + 10020738357891.

It is an arithmetic number, because the mean of its divisors is an integer number (10020738357891).

Almost surely, 2^{20041476715781} is an apocalyptic number.

It is an amenable number.

20041476715781 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041476715781 is an equidigital number, since it uses as much as digits as its factorization.

20041476715781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2634240, while the sum is 53.

The spelling of 20041476715781 in words is "twenty trillion, forty-one billion, four hundred seventy-six million, seven hundred fifteen thousand, seven hundred eighty-one".