19996847 has 8 divisors (see below), whose sum is σ = 21942144. Its totient is φ = 18109728.

The previous prime is 19996831. The next prime is 19996853. The reversal of 19996847 is 74869991.

It is a happy number.

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

It is not a de Polignac number, because 19996847 - 2⁴ = 19996831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19996447) 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 7 ways as a sum of consecutive naturals, for example, 13823 + ... + 15200.

It is an arithmetic number, because the mean of its divisors is an integer number (2742768).

Almost surely, 2^19996847 is an apocalyptic number.

19996847 is a deficient number, since it is larger than the sum of its proper divisors (1945297).

19996847 is a wasteful number, since it uses less digits than its factorization.

19996847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29089.

The product of its digits is 979776, while the sum is 53.

The square root of 19996847 is about 4471.7834249883. The cubic root of 19996847 is about 271.4274966453.

The spelling of 19996847 in words is "nineteen million, nine hundred ninety-six thousand, eight hundred forty-seven".