20404414304077 has 2 divisors, whose sum is σ = 20404414304078. Its totient is φ = 20404414304076.

The previous prime is 20404414303979. The next prime is 20404414304093. The reversal of 20404414304077 is 77040341440402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16904095108681 + 3500319195396 = 4111459^2 + 1870914^2 .

It is a cyclic number.

It is not a de Polignac number, because 20404414304077 - 2¹¹ = 20404414302029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20404414304977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202207152038 + 10202207152039.

It is an arithmetic number, because the mean of its divisors is an integer number (10202207152039).

Almost surely, 2^{20404414304077} is an apocalyptic number.

It is an amenable number.

20404414304077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404414304077 is an equidigital number, since it uses as much as digits as its factorization.

20404414304077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 301056, while the sum is 40.

Adding to 20404414304077 its reverse (77040341440402), we get a palindrome (97444755744479).

The spelling of 20404414304077 in words is "twenty trillion, four hundred four billion, four hundred fourteen million, three hundred four thousand, seventy-seven".