20097 has 24 divisors (see below), whose sum is σ = 37440. Its totient is φ = 10080.

The previous prime is 20089. The next prime is 20101. The reversal of 20097 is 79002.

It is not a de Polignac number, because 20097 - 2³ = 20089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 679 + ... + 707.

It is an arithmetic number, because the mean of its divisors is an integer number (1560).

2²⁰⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

20097 is a deficient number, since it is larger than the sum of its proper divisors (17343).

20097 is a wasteful number, since it uses less digits than its factorization.

20097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 20097 is about 141.7638882085. The cubic root of 20097 is about 27.1879884970.

Adding to 20097 its reverse (79002), we get a palindrome (99099).

It can be divided in two parts, 2009 and 7, that added together give a triangular number (2016 = T₆₃).

The spelling of 20097 in words is "twenty thousand, ninety-seven".