20919168419 has 4 divisors (see below), whose sum is σ = 20923434720. Its totient is φ = 20914902120.

The previous prime is 20919168401. The next prime is 20919168437. The reversal of 20919168419 is 91486191902.

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

It is an interprime number because it is at equal distance from previous prime (20919168401) and next prime (20919168437).

It is a cyclic number.

It is not a de Polignac number, because 20919168419 - 2³² = 16624201123 is a prime.

It is a super-2 number, since 2×20919168419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20919162419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125787 + ... + 2135604.

It is an arithmetic number, because the mean of its divisors is an integer number (5230858680).

Almost surely, 2^20919168419 is an apocalyptic number.

20919168419 is a deficient number, since it is larger than the sum of its proper divisors (4266301).

20919168419 is an equidigital number, since it uses as much as digits as its factorization.

20919168419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266300.

The product of its (nonzero) digits is 279936, while the sum is 50.

The spelling of 20919168419 in words is "twenty billion, nine hundred nineteen million, one hundred sixty-eight thousand, four hundred nineteen".