20003123377 has 2 divisors, whose sum is σ = 20003123378. Its totient is φ = 20003123376.

The previous prime is 20003123359. The next prime is 20003123471. The reversal of 20003123377 is 77332130002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18361334016 + 1641789361 = 135504^2 + 40519^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003123377 - 2³¹ = 17855639729 is a prime.

It is not a weakly prime, because it can be changed into another prime (20003123977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001561688 + 10001561689.

It is an arithmetic number, because the mean of its divisors is an integer number (10001561689).

Almost surely, 2^20003123377 is an apocalyptic number.

It is an amenable number.

20003123377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003123377 is an equidigital number, since it uses as much as digits as its factorization.

20003123377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 28.

Adding to 20003123377 its reverse (77332130002), we get a palindrome (97335253379).

It can be divided in two parts, 20003 and 123377, that added together give a triangular number (143380 = T₅₃₅).

The spelling of 20003123377 in words is "twenty billion, three million, one hundred twenty-three thousand, three hundred seventy-seven".