19947047 has 8 divisors (see below), whose sum is σ = 20236176. Its totient is φ = 19660032.

The previous prime is 19947029. The next prime is 19947071. The reversal of 19947047 is 74074991.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19947047 - 2⁸ = 19946791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19946995 and 19947013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19947247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29303 + ... + 29975.

It is an arithmetic number, because the mean of its divisors is an integer number (2529522).

Almost surely, 2^19947047 is an apocalyptic number.

19947047 is a deficient number, since it is larger than the sum of its proper divisors (289129).

19947047 is a wasteful number, since it uses less digits than its factorization.

19947047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057.

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

The square root of 19947047 is about 4466.2117056853. The cubic root of 19947047 is about 271.2019889967.

The spelling of 19947047 in words is "nineteen million, nine hundred forty-seven thousand, forty-seven".