20099847877 has 2 divisors, whose sum is σ = 20099847878. Its totient is φ = 20099847876.

The previous prime is 20099847869. The next prime is 20099847899. The reversal of 20099847877 is 77874899002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10371181921 + 9728665956 = 101839^2 + 98634^2 .

It is a cyclic number.

It is not a de Polignac number, because 20099847877 - 2³ = 20099847869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20099847827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10049923938 + 10049923939.

It is an arithmetic number, because the mean of its divisors is an integer number (10049923939).

Almost surely, 2^20099847877 is an apocalyptic number.

It is an amenable number.

20099847877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20099847877 is an equidigital number, since it uses as much as digits as its factorization.

20099847877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14224896, while the sum is 61.

The spelling of 20099847877 in words is "twenty billion, ninety-nine million, eight hundred forty-seven thousand, eight hundred seventy-seven".