20308432 has 20 divisors (see below), whose sum is σ = 39496356. Its totient is φ = 10115840.

The previous prime is 20308411. The next prime is 20308447. The reversal of 20308432 is 23480302.

It can be written as a sum of positive squares in 2 ways, for example, as 4910656 + 15397776 = 2216^2 + 3924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2238 + ... + 6754.

Almost surely, 2^20308432 is an apocalyptic number.

It is an amenable number.

20308432 is a deficient number, since it is larger than the sum of its proper divisors (19187924).

20308432 is a wasteful number, since it uses less digits than its factorization.

20308432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806 (or 4800 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20308432 is about 4506.4877676523. The cubic root of 20308432 is about 272.8300050415.

Adding to 20308432 its reverse (23480302), we get a palindrome (43788734).

The spelling of 20308432 in words is "twenty million, three hundred eight thousand, four hundred thirty-two".