20311011377 has 2 divisors, whose sum is σ = 20311011378. Its totient is φ = 20311011376.

The previous prime is 20311011317. The next prime is 20311011389. The reversal of 20311011377 is 77311011302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11980615936 + 8330395441 = 109456^2 + 91271^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311011377 - 2¹⁶ = 20310945841 is a prime.

It is a super-2 number, since 2×20311011377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20311011317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155505688 + 10155505689.

It is an arithmetic number, because the mean of its divisors is an integer number (10155505689).

Almost surely, 2^20311011377 is an apocalyptic number.

It is an amenable number.

20311011377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311011377 is an equidigital number, since it uses as much as digits as its factorization.

20311011377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 26.

Adding to 20311011377 its reverse (77311011302), we get a palindrome (97622022679).

The spelling of 20311011377 in words is "twenty billion, three hundred eleven million, eleven thousand, three hundred seventy-seven".