19187242 has 8 divisors (see below), whose sum is σ = 28884132. Its totient is φ = 9559200.

The previous prime is 19187239. The next prime is 19187251. The reversal of 19187242 is 24278191.

It can be written as a sum of positive squares in 2 ways, for example, as 19018321 + 168921 = 4361^2 + 411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19187198 and 19187207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16509 + ... + 17632.

Almost surely, 2^19187242 is an apocalyptic number.

19187242 is a deficient number, since it is larger than the sum of its proper divisors (9696890).

19187242 is a wasteful number, since it uses less digits than its factorization.

19187242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34424.

The product of its digits is 8064, while the sum is 34.

The square root of 19187242 is about 4380.3244172093. The cubic root of 19187242 is about 267.7138569914.

The spelling of 19187242 in words is "nineteen million, one hundred eighty-seven thousand, two hundred forty-two".