20130847 has 4 divisors (see below), whose sum is σ = 21960936. Its totient is φ = 18300760.

The previous prime is 20130841. The next prime is 20130881. The reversal of 20130847 is 74803102.

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

It is a cyclic number.

It is not a de Polignac number, because 20130847 - 2¹⁵ = 20098079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130841) 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 in 3 ways as a sum of consecutive naturals, for example, 915028 + ... + 915049.

It is an arithmetic number, because the mean of its divisors is an integer number (5490234).

Almost surely, 2^20130847 is an apocalyptic number.

20130847 is a deficient number, since it is larger than the sum of its proper divisors (1830089).

20130847 is a wasteful number, since it uses less digits than its factorization.

20130847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830088.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20130847 is about 4486.7412450463. The cubic root of 20130847 is about 272.0324310739.

Adding to 20130847 its reverse (74803102), we get a palindrome (94933949).

The spelling of 20130847 in words is "twenty million, one hundred thirty thousand, eight hundred forty-seven".