20413635877 has 2 divisors, whose sum is σ = 20413635878. Its totient is φ = 20413635876.

The previous prime is 20413635863. The next prime is 20413635883. The reversal of 20413635877 is 77853631402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18432406756 + 1981229121 = 135766^2 + 44511^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413635877 - 2¹¹ = 20413633829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413639877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206817938 + 10206817939.

It is an arithmetic number, because the mean of its divisors is an integer number (10206817939).

Almost surely, 2^20413635877 is an apocalyptic number.

It is an amenable number.

20413635877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413635877 is an equidigital number, since it uses as much as digits as its factorization.

20413635877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 20413635877 in words is "twenty billion, four hundred thirteen million, six hundred thirty-five thousand, eight hundred seventy-seven".