19141919 has 4 divisors (see below), whose sum is σ = 19151496. Its totient is φ = 19132344.

The previous prime is 19141897. The next prime is 19141921. The reversal of 19141919 is 91914191.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91914191 = 19 ⋅4837589.

It is a cyclic number.

It is not a de Polignac number, because 19141919 - 2²⁰ = 18093343 is a prime.

It is a super-2 number, since 2×19141919² = 732826126005122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19141939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524 + ... + 6209.

It is an arithmetic number, because the mean of its divisors is an integer number (4787874).

Almost surely, 2^19141919 is an apocalyptic number.

19141919 is a deficient number, since it is larger than the sum of its proper divisors (9577).

19141919 is an equidigital number, since it uses as much as digits as its factorization.

19141919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9576.

The product of its digits is 2916, while the sum is 35.

The square root of 19141919 is about 4375.1478832149. The cubic root of 19141919 is about 267.5028980383.

The spelling of 19141919 in words is "nineteen million, one hundred forty-one thousand, nine hundred nineteen".