20104716881 has 2 divisors, whose sum is σ = 20104716882. Its totient is φ = 20104716880.

The previous prime is 20104716869. The next prime is 20104716901. The reversal of 20104716881 is 18861740102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16593561856 + 3511155025 = 128816^2 + 59255^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104716881 - 2¹⁰ = 20104715857 is a prime.

It is a super-2 number, since 2×20104716881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20104716481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052358440 + 10052358441.

It is an arithmetic number, because the mean of its divisors is an integer number (10052358441).

Almost surely, 2^20104716881 is an apocalyptic number.

It is an amenable number.

20104716881 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104716881 is an equidigital number, since it uses as much as digits as its factorization.

20104716881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 38.

The spelling of 20104716881 in words is "twenty billion, one hundred four million, seven hundred sixteen thousand, eight hundred eighty-one".