20008229 has 16 divisors (see below), whose sum is σ = 21676032. Its totient is φ = 18422448.

The previous prime is 20008223. The next prime is 20008243. The reversal of 20008229 is 92280002.

It is not a de Polignac number, because 20008229 - 2⁸ = 20007973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20008223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89612 + ... + 89834.

It is an arithmetic number, because the mean of its divisors is an integer number (1354752).

Almost surely, 2^20008229 is an apocalyptic number.

It is an amenable number.

20008229 is a deficient number, since it is larger than the sum of its proper divisors (1667803).

20008229 is a wasteful number, since it uses less digits than its factorization.

20008229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20008229 is about 4473.0558905518. The cubic root of 20008229 is about 271.4789847924.

The spelling of 20008229 in words is "twenty million, eight thousand, two hundred twenty-nine".