20004310521077 has 2 divisors, whose sum is σ = 20004310521078. Its totient is φ = 20004310521076.

The previous prime is 20004310521067. The next prime is 20004310521137. The reversal of 20004310521077 is 77012501340002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12638373392401 + 7365937128676 = 3555049^2 + 2714026^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004310521077 - 2¹⁶ = 20004310455541 is a prime.

It is a super-2 number, since 2×20004310521077² (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 (20004310521067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002155260538 + 10002155260539.

It is an arithmetic number, because the mean of its divisors is an integer number (10002155260539).

Almost surely, 2^{20004310521077} is an apocalyptic number.

It is an amenable number.

20004310521077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004310521077 is an equidigital number, since it uses as much as digits as its factorization.

20004310521077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 32.

Adding to 20004310521077 its reverse (77012501340002), we get a palindrome (97016811861079).

The spelling of 20004310521077 in words is "twenty trillion, four billion, three hundred ten million, five hundred twenty-one thousand, seventy-seven".