20183387167217 has 2 divisors, whose sum is σ = 20183387167218. Its totient is φ = 20183387167216.

The previous prime is 20183387167189. The next prime is 20183387167231. The reversal of 20183387167217 is 71276178338102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19929072711601 + 254314455616 = 4464199^2 + 504296^2 .

It is a cyclic number.

It is not a de Polignac number, because 20183387167217 - 2²² = 20183382972913 is a prime.

It is not a weakly prime, because it can be changed into another prime (20183387167417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10091693583608 + 10091693583609.

It is an arithmetic number, because the mean of its divisors is an integer number (10091693583609).

Almost surely, 2^{20183387167217} is an apocalyptic number.

It is an amenable number.

20183387167217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20183387167217 is an equidigital number, since it uses as much as digits as its factorization.

20183387167217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 20183387167217 in words is "twenty trillion, one hundred eighty-three billion, three hundred eighty-seven million, one hundred sixty-seven thousand, two hundred seventeen".