20194500763819 has 4 divisors (see below), whose sum is σ = 20243876071720. Its totient is φ = 20145125455920.

The previous prime is 20194500763739. The next prime is 20194500763867. The reversal of 20194500763819 is 91836700549102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20194500763819 - 2²⁵ = 20194467209387 is a prime.

It is a super-2 number, since 2×20194500763819² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20194500763819.

It is not an unprimeable number, because it can be changed into a prime (20194501763819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24687653337 + ... + 24687654154.

It is an arithmetic number, because the mean of its divisors is an integer number (5060969017930).

It is a 3-persistent number, because k⋅20194500763819 is pandigital for 1 ≤ k ≤ 3, but not for k = 4.

Almost surely, 2^{20194500763819} is an apocalyptic number.

20194500763819 is a deficient number, since it is larger than the sum of its proper divisors (49375307901).

20194500763819 is an equidigital number, since it uses as much as digits as its factorization.

20194500763819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49375307900.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 20194500763819 in words is "twenty trillion, one hundred ninety-four billion, five hundred million, seven hundred sixty-three thousand, eight hundred nineteen".