20354734700917 has 2 divisors, whose sum is σ = 20354734700918. Its totient is φ = 20354734700916.

The previous prime is 20354734700851. The next prime is 20354734700999. The reversal of 20354734700917 is 71900743745302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15235235658756 + 5119499042161 = 3903234^2 + 2262631^2 .

It is a cyclic number.

It is not a de Polignac number, because 20354734700917 - 2¹¹ = 20354734698869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354734703917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177367350458 + 10177367350459.

It is an arithmetic number, because the mean of its divisors is an integer number (10177367350459).

Almost surely, 2^{20354734700917} is an apocalyptic number.

It is an amenable number.

20354734700917 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354734700917 is an equidigital number, since it uses as much as digits as its factorization.

20354734700917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4445280, while the sum is 52.

It can be divided in two parts, 203547 and 34700917, that added together give a square (34904464 = 5908²).

The spelling of 20354734700917 in words is "twenty trillion, three hundred fifty-four billion, seven hundred thirty-four million, seven hundred thousand, nine hundred seventeen".