20000797 has 4 divisors (see below), whose sum is σ = 20646016. Its totient is φ = 19355580.

The previous prime is 20000791. The next prime is 20000801. The reversal of 20000797 is 79700002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20000797 - 2¹⁵ = 19968029 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 (20000791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322563 + ... + 322624.

It is an arithmetic number, because the mean of its divisors is an integer number (5161504).

Almost surely, 2^20000797 is an apocalyptic number.

It is an amenable number.

20000797 is a deficient number, since it is larger than the sum of its proper divisors (645219).

20000797 is an equidigital number, since it uses as much as digits as its factorization.

20000797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645218.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 20000797 is about 4472.2250614208. The cubic root of 20000797 is about 271.4453672630.

Adding to 20000797 its reverse (79700002), we get a palindrome (99700799).

The spelling of 20000797 in words is "twenty million, seven hundred ninety-seven", and thus it is an aban number.