20317354091 has 2 divisors, whose sum is σ = 20317354092. Its totient is φ = 20317354090.

The previous prime is 20317354081. The next prime is 20317354121. The reversal of 20317354091 is 19045371302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20317354091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20317354051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158677045 + 10158677046.

It is an arithmetic number, because the mean of its divisors is an integer number (10158677046).

Almost surely, 2^20317354091 is an apocalyptic number.

20317354091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20317354091 is an equidigital number, since it uses as much as digits as its factorization.

20317354091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 20317354091 in words is "twenty billion, three hundred seventeen million, three hundred fifty-four thousand, ninety-one".