20537810718419 has 2 divisors, whose sum is σ = 20537810718420. Its totient is φ = 20537810718418.

The previous prime is 20537810718391. The next prime is 20537810718449. The reversal of 20537810718419 is 91481701873502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20537810718419 - 2⁴⁰ = 19438299090643 is a prime.

It is a super-2 number, since 2×20537810718419² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20537810718449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268905359209 + 10268905359210.

It is an arithmetic number, because the mean of its divisors is an integer number (10268905359210).

Almost surely, 2^{20537810718419} is an apocalyptic number.

20537810718419 is a deficient number, since it is larger than the sum of its proper divisors (1).

20537810718419 is an equidigital number, since it uses as much as digits as its factorization.

20537810718419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 20537810718419 in words is "twenty trillion, five hundred thirty-seven billion, eight hundred ten million, seven hundred eighteen thousand, four hundred nineteen".