20802097 has 8 divisors (see below), whose sum is σ = 21752640. Its totient is φ = 19855440.

The previous prime is 20802083. The next prime is 20802107. The reversal of 20802097 is 79020802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20802097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20802697) 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 7 ways as a sum of consecutive naturals, for example, 18522 + ... + 19612.

It is an arithmetic number, because the mean of its divisors is an integer number (2719080).

Almost surely, 2^20802097 is an apocalyptic number.

It is an amenable number.

20802097 is a deficient number, since it is larger than the sum of its proper divisors (950543).

20802097 is a wasteful number, since it uses less digits than its factorization.

20802097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 20802097 is about 4560.9315934357. The cubic root of 20802097 is about 275.0230151537.

Adding to 20802097 its reverse (79020802), we get a palindrome (99822899).

The spelling of 20802097 in words is "twenty million, eight hundred two thousand, ninety-seven".