19816174419 has 16 divisors (see below), whose sum is σ = 26489014272. Its totient is φ = 13177090368.

The previous prime is 19816174403. The next prime is 19816174439. The reversal of 19816174419 is 91447161891.

It is not a de Polignac number, because 19816174419 - 2⁴ = 19816174403 is a prime.

It is a super-2 number, since 2×19816174419² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19816174439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4453854 + ... + 4458300.

It is an arithmetic number, because the mean of its divisors is an integer number (1655563392).

Almost surely, 2^19816174419 is an apocalyptic number.

19816174419 is a deficient number, since it is larger than the sum of its proper divisors (6672839853).

19816174419 is a wasteful number, since it uses less digits than its factorization.

19816174419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7906.

The product of its digits is 435456, while the sum is 51.

The spelling of 19816174419 in words is "nineteen billion, eight hundred sixteen million, one hundred seventy-four thousand, four hundred nineteen".