19847242 has 4 divisors (see below), whose sum is σ = 29770866. Its totient is φ = 9923620.

The previous prime is 19847213. The next prime is 19847251. The reversal of 19847242 is 24274891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17884441 + 1962801 = 4229^2 + 1401^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4961809 + ... + 4961812.

Almost surely, 2^19847242 is an apocalyptic number.

19847242 is a deficient number, since it is larger than the sum of its proper divisors (9923624).

19847242 is an equidigital number, since it uses as much as digits as its factorization.

19847242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9923623.

The product of its digits is 32256, while the sum is 37.

The square root of 19847242 is about 4455.0243545911. The cubic root of 19847242 is about 270.7489130073.

The spelling of 19847242 in words is "nineteen million, eight hundred forty-seven thousand, two hundred forty-two".