20002229 has 4 divisors (see below), whose sum is σ = 21540876. Its totient is φ = 18463584.

The previous prime is 20002201. The next prime is 20002261. The reversal of 20002229 is 92220002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12439729 + 7562500 = 3527^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002229 - 2²⁰ = 18953653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769304 + ... + 769329.

It is an arithmetic number, because the mean of its divisors is an integer number (5385219).

Almost surely, 2^20002229 is an apocalyptic number.

It is an amenable number.

20002229 is a deficient number, since it is larger than the sum of its proper divisors (1538647).

20002229 is a wasteful number, since it uses less digits than its factorization.

20002229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538646.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20002229 is about 4472.3851578325. The cubic root of 20002229 is about 271.4518453463.

The spelling of 20002229 in words is "twenty million, two thousand, two hundred twenty-nine".