20886496277 has 2 divisors, whose sum is σ = 20886496278. Its totient is φ = 20886496276.

The previous prime is 20886496231. The next prime is 20886496297. The reversal of 20886496277 is 77269468802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19530342001 + 1356154276 = 139751^2 + 36826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20886496277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20886496297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10443248138 + 10443248139.

It is an arithmetic number, because the mean of its divisors is an integer number (10443248139).

Almost surely, 2^20886496277 is an apocalyptic number.

It is an amenable number.

20886496277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20886496277 is an equidigital number, since it uses as much as digits as its factorization.

20886496277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 20886496277 in words is "twenty billion, eight hundred eighty-six million, four hundred ninety-six thousand, two hundred seventy-seven".