20332404 has 48 divisors (see below), whose sum is σ = 54423040. Its totient is φ = 6557760.

The previous prime is 20332397. The next prime is 20332409. The reversal of 20332404 is 40423302.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312 + ... + 6384.

Almost surely, 2^20332404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20332404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27211520).

20332404 is an abundant number, since it is smaller than the sum of its proper divisors (34090636).

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

20332404 is a wasteful number, since it uses less digits than its factorization.

20332404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117 (or 6109 counting only the distinct ones).

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

The square root of 20332404 is about 4509.1467042003. The cubic root of 20332404 is about 272.9373120161.

Adding to 20332404 its reverse (40423302), we get a palindrome (60755706).

It can be divided in two parts, 20332 and 404, that multiplied together give a palindrome (8214128).

The spelling of 20332404 in words is "twenty million, three hundred thirty-two thousand, four hundred four".