19190842 has 12 divisors (see below), whose sum is σ = 31641498. Its totient is φ = 8723000.

The previous prime is 19190839. The next prime is 19190849. The reversal of 19190842 is 24809191.

It can be written as a sum of positive squares in only one way, i.e., 13905441 + 5285401 = 3729^2 + 2299^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19190798 and 19190807.

It is not an unprimeable number, because it can be changed into a prime (19190849) 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 5 ways as a sum of consecutive naturals, for example, 39409 + ... + 39892.

Almost surely, 2^19190842 is an apocalyptic number.

19190842 is a deficient number, since it is larger than the sum of its proper divisors (12450656).

19190842 is a wasteful number, since it uses less digits than its factorization.

19190842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79325 (or 79314 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 19190842 is about 4380.7353264035. The cubic root of 19190842 is about 267.7305991860.

The spelling of 19190842 in words is "nineteen million, one hundred ninety thousand, eight hundred forty-two".