20105836799 has 2 divisors, whose sum is σ = 20105836800. Its totient is φ = 20105836798.

The previous prime is 20105836771. The next prime is 20105836813. The reversal of 20105836799 is 99763850102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20105836799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20105836739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052918399 + 10052918400.

It is an arithmetic number, because the mean of its divisors is an integer number (10052918400).

Almost surely, 2^20105836799 is an apocalyptic number.

20105836799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20105836799 is an equidigital number, since it uses as much as digits as its factorization.

20105836799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 20105836799 in words is "twenty billion, one hundred five million, eight hundred thirty-six thousand, seven hundred ninety-nine".