20204432 has 40 divisors (see below), whose sum is σ = 42184800. Its totient is φ = 9339392.

The previous prime is 20204417. The next prime is 20204477. The reversal of 20204432 is 23440202.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20204432.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15419 + ... + 16677.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^20204432 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 20204432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21092400).

20204432 is an abundant number, since it is smaller than the sum of its proper divisors (21980368).

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

20204432 is a wasteful number, since it uses less digits than its factorization.

20204432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20204432 is about 4494.9340373358. The cubic root of 20204432 is about 272.3634846326.

Adding to 20204432 its reverse (23440202), we get a palindrome (43644634).

The spelling of 20204432 in words is "twenty million, two hundred four thousand, four hundred thirty-two".