20379101261 has 2 divisors, whose sum is σ = 20379101262. Its totient is φ = 20379101260.

The previous prime is 20379101233. The next prime is 20379101273. The reversal of 20379101261 is 16210197302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17879701225 + 2499400036 = 133715^2 + 49994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20379101261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20379101201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10189550630 + 10189550631.

It is an arithmetic number, because the mean of its divisors is an integer number (10189550631).

Almost surely, 2^20379101261 is an apocalyptic number.

It is an amenable number.

20379101261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20379101261 is an equidigital number, since it uses as much as digits as its factorization.

20379101261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

Adding to 20379101261 its reverse (16210197302), we get a palindrome (36589298563).

The spelling of 20379101261 in words is "twenty billion, three hundred seventy-nine million, one hundred one thousand, two hundred sixty-one".