20228199 has 4 divisors (see below), whose sum is σ = 26970936. Its totient is φ = 13485464.

The previous prime is 20228177. The next prime is 20228203. The reversal of 20228199 is 99182202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20228199 - 2¹³ = 20220007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228099) 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, 3371364 + ... + 3371369.

It is an arithmetic number, because the mean of its divisors is an integer number (6742734).

Almost surely, 2^20228199 is an apocalyptic number.

20228199 is a deficient number, since it is larger than the sum of its proper divisors (6742737).

20228199 is an equidigital number, since it uses as much as digits as its factorization.

20228199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6742736.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20228199 is about 4497.5770143489. The cubic root of 20228199 is about 272.4702388730.

The spelling of 20228199 in words is "twenty million, two hundred twenty-eight thousand, one hundred ninety-nine".