20228097 has 4 divisors (see below), whose sum is σ = 26970800. Its totient is φ = 13485396.

The previous prime is 20228093. The next prime is 20228099. The reversal of 20228097 is 79082202.

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 20228097 - 2² = 20228093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20228093) 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, 3371347 + ... + 3371352.

It is an arithmetic number, because the mean of its divisors is an integer number (6742700).

Almost surely, 2^20228097 is an apocalyptic number.

It is an amenable number.

20228097 is a deficient number, since it is larger than the sum of its proper divisors (6742703).

20228097 is an equidigital number, since it uses as much as digits as its factorization.

20228097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6742702.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20228097 is about 4497.5656748957. The cubic root of 20228097 is about 272.4697808983.

The spelling of 20228097 in words is "twenty million, two hundred twenty-eight thousand, ninety-seven".