20020847 has 8 divisors (see below), whose sum is σ = 24961152. Its totient is φ = 15600600.

The previous prime is 20020841. The next prime is 20020901. The reversal of 20020847 is 74802002.

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 20020847 - 2²⁰ = 18972271 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 (20020841) 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, 129929 + ... + 130082.

It is an arithmetic number, because the mean of its divisors is an integer number (3120144).

Almost surely, 2^20020847 is an apocalyptic number.

20020847 is a deficient number, since it is larger than the sum of its proper divisors (4940305).

20020847 is a wasteful number, since it uses less digits than its factorization.

20020847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260029.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 20020847 is about 4474.4661134039. The cubic root of 20020847 is about 271.5360413497.

Adding to 20020847 its reverse (74802002), we get a palindrome (94822849).

The spelling of 20020847 in words is "twenty million, twenty thousand, eight hundred forty-seven".