20344131377 has 2 divisors, whose sum is σ = 20344131378. Its totient is φ = 20344131376.

The previous prime is 20344131371. The next prime is 20344131469. The reversal of 20344131377 is 77313144302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20064439201 + 279692176 = 141649^2 + 16724^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344131377 - 2¹⁰ = 20344130353 is a prime.

It is a super-2 number, since 2×20344131377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20344131371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172065688 + 10172065689.

It is an arithmetic number, because the mean of its divisors is an integer number (10172065689).

Almost surely, 2^20344131377 is an apocalyptic number.

It is an amenable number.

20344131377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344131377 is an equidigital number, since it uses as much as digits as its factorization.

20344131377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

Adding to 20344131377 its reverse (77313144302), we get a palindrome (97657275679).

The spelling of 20344131377 in words is "twenty billion, three hundred forty-four million, one hundred thirty-one thousand, three hundred seventy-seven".