20875097 has 4 divisors (see below), whose sum is σ = 21319296. Its totient is φ = 20430900.

The previous prime is 20875093. The next prime is 20875103. The reversal of 20875097 is 79057802.

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 not a de Polignac number, because 20875097 - 2² = 20875093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20875097.

It is not an unprimeable number, because it can be changed into a prime (20875093) 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, 222029 + ... + 222122.

It is an arithmetic number, because the mean of its divisors is an integer number (5329824).

Almost surely, 2^20875097 is an apocalyptic number.

It is an amenable number.

20875097 is a deficient number, since it is larger than the sum of its proper divisors (444199).

20875097 is an equidigital number, since it uses as much as digits as its factorization.

20875097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444198.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 20875097 is about 4568.9273358196. The cubic root of 20875097 is about 275.3443487995.

The spelling of 20875097 in words is "twenty million, eight hundred seventy-five thousand, ninety-seven".