20276031091 has 2 divisors, whose sum is σ = 20276031092. Its totient is φ = 20276031090.

The previous prime is 20276031077. The next prime is 20276031109. The reversal of 20276031091 is 19013067202.

Together with next prime (20276031109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20276031091 is a prime.

It is a super-2 number, since 2×20276031091² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20276031071) 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, 10138015545 + 10138015546.

It is an arithmetic number, because the mean of its divisors is an integer number (10138015546).

Almost surely, 2^20276031091 is an apocalyptic number.

20276031091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20276031091 is an equidigital number, since it uses as much as digits as its factorization.

20276031091 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 31.

Adding to 20276031091 its reverse (19013067202), we get a palindrome (39289098293).

The spelling of 20276031091 in words is "twenty billion, two hundred seventy-six million, thirty-one thousand, ninety-one".