20276031791 has 2 divisors, whose sum is σ = 20276031792. Its totient is φ = 20276031790.

The previous prime is 20276031749. The next prime is 20276031817. The reversal of 20276031791 is 19713067202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20276031791 - 2¹⁴ = 20276015407 is a prime.

It is a super-2 number, since 2×20276031791² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20276031091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138015895 + 10138015896.

It is an arithmetic number, because the mean of its divisors is an integer number (10138015896).

Almost surely, 2^20276031791 is an apocalyptic number.

20276031791 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276031791 is an equidigital number, since it uses as much as digits as its factorization.

20276031791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

Adding to 20276031791 its reverse (19713067202), we get a palindrome (39989098993).

The spelling of 20276031791 in words is "twenty billion, two hundred seventy-six million, thirty-one thousand, seven hundred ninety-one".