20313146145091 has 2 divisors, whose sum is σ = 20313146145092. Its totient is φ = 20313146145090.

The previous prime is 20313146145013. The next prime is 20313146145109. The reversal of 20313146145091 is 19054164131302.

Together with next prime (20313146145109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20313146145091 - 2⁹ = 20313146144579 is a prime.

It is not a weakly prime, because it can be changed into another prime (20313146145491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156573072545 + 10156573072546.

It is an arithmetic number, because the mean of its divisors is an integer number (10156573072546).

Almost surely, 2^{20313146145091} is an apocalyptic number.

20313146145091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313146145091 is an equidigital number, since it uses as much as digits as its factorization.

20313146145091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 20313146145091 in words is "twenty trillion, three hundred thirteen billion, one hundred forty-six million, one hundred forty-five thousand, ninety-one".