20205432 has 48 divisors (see below), whose sum is σ = 58935240. Its totient is φ = 6216768.

The previous prime is 20205389. The next prime is 20205467. The reversal of 20205432 is 23450202.

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

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9858 + ... + 11729.

Almost surely, 2^20205432 is an apocalyptic number.

It is an amenable number.

20205432 is an abundant number, since it is smaller than the sum of its proper divisors (38729808).

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

20205432 is a wasteful number, since it uses less digits than its factorization.

20205432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21612 (or 21605 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20205432 is about 4495.0452722970. The cubic root of 20205432 is about 272.3679780195.

Adding to 20205432 its reverse (23450202), we get a palindrome (43655634).

The spelling of 20205432 in words is "twenty million, two hundred five thousand, four hundred thirty-two".