20830097 has 4 divisors (see below), whose sum is σ = 21171636. Its totient is φ = 20488560.

The previous prime is 20830067. The next prime is 20830133. The reversal of 20830097 is 79003802.

It is a Cunningham number, because it is equal to 4564²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 678976 + 20151121 = 824^2 + 4489^2 .

It is a cyclic number.

It is not a de Polignac number, because 20830097 - 2⁸ = 20829841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20830027) 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, 170678 + ... + 170799.

It is an arithmetic number, because the mean of its divisors is an integer number (5292909).

Almost surely, 2^20830097 is an apocalyptic number.

It is an amenable number.

20830097 is a deficient number, since it is larger than the sum of its proper divisors (341539).

20830097 is an equidigital number, since it uses as much as digits as its factorization.

20830097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341538.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20830097 is about 4564.0001095530. Note that the first 3 decimals coincide. The cubic root of 20830097 is about 275.1463551537.

Adding to 20830097 its reverse (79003802), we get a palindrome (99833899).

The spelling of 20830097 in words is "twenty million, eight hundred thirty thousand, ninety-seven".