19471243 has 4 divisors (see below), whose sum is σ = 21241368. Its totient is φ = 17701120.

The previous prime is 19471237. The next prime is 19471247. The reversal of 19471243 is 34217491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19471243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19471247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885046 + ... + 885067.

It is an arithmetic number, because the mean of its divisors is an integer number (5310342).

Almost surely, 2^19471243 is an apocalyptic number.

19471243 is a deficient number, since it is larger than the sum of its proper divisors (1770125).

19471243 is a wasteful number, since it uses less digits than its factorization.

19471243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770124.

The product of its digits is 6048, while the sum is 31.

The square root of 19471243 is about 4412.6231427576. The cubic root of 19471243 is about 269.0282535057.

The spelling of 19471243 in words is "nineteen million, four hundred seventy-one thousand, two hundred forty-three".