20208133 has 4 divisors (see below), whose sum is σ = 22045248. Its totient is φ = 18371020.

The previous prime is 20208109. The next prime is 20208163. The reversal of 20208133 is 33180202.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 20208133 - 2⁵ = 20208101 is a prime.

It is a super-3 number, since 3×20208133³ (a number of 23 digits) contains 333 as substring.

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 20208133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20208163) 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, 918541 + ... + 918562.

It is an arithmetic number, because the mean of its divisors is an integer number (5511312).

Almost surely, 2^20208133 is an apocalyptic number.

It is an amenable number.

20208133 is a deficient number, since it is larger than the sum of its proper divisors (1837115).

20208133 is a wasteful number, since it uses less digits than its factorization.

20208133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837114.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20208133 is about 4495.3457041700. The cubic root of 20208133 is about 272.3801139166.

Adding to 20208133 its reverse (33180202), we get a palindrome (53388335).

It can be divided in two parts, 2020 and 8133, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 20208133 in words is "twenty million, two hundred eight thousand, one hundred thirty-three".