20204100377 has 2 divisors, whose sum is σ = 20204100378. Its totient is φ = 20204100376.

The previous prime is 20204100317. The next prime is 20204100403. The reversal of 20204100377 is 77300140202.

It is an a-pointer prime, because the next prime (20204100403) can be obtained adding 20204100377 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15103426816 + 5100673561 = 122896^2 + 71419^2 .

It is a cyclic number.

It is not a de Polignac number, because 20204100377 - 2⁸ = 20204100121 is a prime.

It is not a weakly prime, because it can be changed into another prime (20204100317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102050188 + 10102050189.

It is an arithmetic number, because the mean of its divisors is an integer number (10102050189).

Almost surely, 2^20204100377 is an apocalyptic number.

It is an amenable number.

20204100377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204100377 is an equidigital number, since it uses as much as digits as its factorization.

20204100377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 26.

Adding to 20204100377 its reverse (77300140202), we get a palindrome (97504240579).

The spelling of 20204100377 in words is "twenty billion, two hundred four million, one hundred thousand, three hundred seventy-seven".