20404332 has 48 divisors (see below), whose sum is σ = 56973280. Its totient is φ = 6277824.

The previous prime is 20404331. The next prime is 20404337. The reversal of 20404332 is 23340402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20404331) 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 15 ways as a sum of consecutive naturals, for example, 5863 + ... + 8670.

Almost surely, 2^20404332 is an apocalyptic number.

It is an amenable number.

20404332 is an abundant number, since it is smaller than the sum of its proper divisors (36568948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20404332 is a wasteful number, since it uses less digits than its factorization.

20404332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14559 (or 14551 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20404332 is about 4517.1154512587. The cubic root of 20404332 is about 273.2587813069.

Adding to 20404332 its reverse (23340402), we get a palindrome (43744734).

It can be divided in two parts, 20404 and 332, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20404332 in words is "twenty million, four hundred four thousand, three hundred thirty-two".