20003555440117 has 2 divisors, whose sum is σ = 20003555440118. Its totient is φ = 20003555440116.

The previous prime is 20003555440111. The next prime is 20003555440189. The reversal of 20003555440117 is 71104455530002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16098639560721 + 3904915879396 = 4012311^2 + 1976086^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003555440117 - 2¹⁵ = 20003555407349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003555440111) 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, 10001777720058 + 10001777720059.

It is an arithmetic number, because the mean of its divisors is an integer number (10001777720059).

Almost surely, 2^{20003555440117} is an apocalyptic number.

It is an amenable number.

20003555440117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003555440117 is an equidigital number, since it uses as much as digits as its factorization.

20003555440117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 20003555440117 in words is "twenty trillion, three billion, five hundred fifty-five million, four hundred forty thousand, one hundred seventeen".