20003555701697 has 2 divisors, whose sum is σ = 20003555701698. Its totient is φ = 20003555701696.

The previous prime is 20003555701627. The next prime is 20003555701699. The reversal of 20003555701697 is 79610755530002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11393973246016 + 8609582455681 = 3375496^2 + 2934209^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003555701697 - 2¹⁰ = 20003555700673 is a prime.

Together with 20003555701699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20003555701699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001777850848 + 10001777850849.

It is an arithmetic number, because the mean of its divisors is an integer number (10001777850849).

Almost surely, 2^{20003555701697} is an apocalyptic number.

It is an amenable number.

20003555701697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003555701697 is an equidigital number, since it uses as much as digits as its factorization.

20003555701697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1984500, while the sum is 50.

The spelling of 20003555701697 in words is "twenty trillion, three billion, five hundred fifty-five million, seven hundred one thousand, six hundred ninety-seven".