19143442 has 4 divisors (see below), whose sum is σ = 28715166. Its totient is φ = 9571720.

The previous prime is 19143437. The next prime is 19143457. The reversal of 19143442 is 24434191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24434191 = 43 ⋅568237.

It can be written as a sum of positive squares in only one way, i.e., 13995081 + 5148361 = 3741^2 + 2269^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19143442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4785859 + ... + 4785862.

Almost surely, 2^19143442 is an apocalyptic number.

19143442 is a deficient number, since it is larger than the sum of its proper divisors (9571724).

19143442 is an equidigital number, since it uses as much as digits as its factorization.

19143442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9571723.

The product of its digits is 3456, while the sum is 28.

The square root of 19143442 is about 4375.3219310126. The cubic root of 19143442 is about 267.5099923481.

It can be divided in two parts, 1914 and 3442, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 19143442 in words is "nineteen million, one hundred forty-three thousand, four hundred forty-two".