20336786887 has 2 divisors, whose sum is σ = 20336786888. Its totient is φ = 20336786886.

The previous prime is 20336786881. The next prime is 20336786917. The reversal of 20336786887 is 78868763302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20336786887 - 2³ = 20336786879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20336786881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10168393443 + 10168393444.

It is an arithmetic number, because the mean of its divisors is an integer number (10168393444).

Almost surely, 2^20336786887 is an apocalyptic number.

20336786887 is a deficient number, since it is larger than the sum of its proper divisors (1).

20336786887 is an equidigital number, since it uses as much as digits as its factorization.

20336786887 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 58.

The spelling of 20336786887 in words is "twenty billion, three hundred thirty-six million, seven hundred eighty-six thousand, eight hundred eighty-seven".