20228833 has 4 divisors (see below), whose sum is σ = 20881408. Its totient is φ = 19576260.

The previous prime is 20228807. The next prime is 20228839. The reversal of 20228833 is 33882202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33882202 = 2 ⋅16941101.

It is a cyclic number.

It is not a de Polignac number, because 20228833 - 2⁵ = 20228801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20228839) 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, 326241 + ... + 326302.

It is an arithmetic number, because the mean of its divisors is an integer number (5220352).

Almost surely, 2^20228833 is an apocalyptic number.

It is an amenable number.

20228833 is a deficient number, since it is larger than the sum of its proper divisors (652575).

20228833 is an equidigital number, since it uses as much as digits as its factorization.

20228833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652574.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20228833 is about 4497.6474961918. The cubic root of 20228833 is about 272.4730854657.

The spelling of 20228833 in words is "twenty million, two hundred twenty-eight thousand, eight hundred thirty-three".