19470947 has 4 divisors (see below), whose sum is σ = 19482216. Its totient is φ = 19459680.

The previous prime is 19470931. The next prime is 19470989. The reversal of 19470947 is 74907491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74907491 = 17 ⋅4406323.

It is a cyclic number.

It is not a de Polignac number, because 19470947 - 2⁴ = 19470931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19470047) 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 3 ways as a sum of consecutive naturals, for example, 2438 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (4870554).

Almost surely, 2^19470947 is an apocalyptic number.

19470947 is a deficient number, since it is larger than the sum of its proper divisors (11269).

19470947 is an equidigital number, since it uses as much as digits as its factorization.

19470947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11268.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 19470947 is about 4412.5896024897. The cubic root of 19470947 is about 269.0268902514.

The spelling of 19470947 in words is "nineteen million, four hundred seventy thousand, nine hundred forty-seven".