20047246 has 4 divisors (see below), whose sum is σ = 30070872. Its totient is φ = 10023622.

The previous prime is 20047241. The next prime is 20047253. The reversal of 20047246 is 64274002.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20047246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20047241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5011810 + ... + 5011813.

It is an arithmetic number, because the mean of its divisors is an integer number (7517718).

Almost surely, 2^20047246 is an apocalyptic number.

20047246 is a deficient number, since it is larger than the sum of its proper divisors (10023626).

20047246 is a wasteful number, since it uses less digits than its factorization.

20047246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10023625.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20047246 is about 4477.4151024894. The cubic root of 20047246 is about 271.6553358634.

The spelling of 20047246 in words is "twenty million, forty-seven thousand, two hundred forty-six".