20408132 has 12 divisors (see below), whose sum is σ = 35832720. Its totient is φ = 10170216.

The previous prime is 20408117. The next prime is 20408189. The reversal of 20408132 is 23180402.

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 3 ways as a sum of consecutive naturals, for example, 7082 + ... + 9537.

It is an arithmetic number, because the mean of its divisors is an integer number (2986060).

Almost surely, 2^20408132 is an apocalyptic number.

It is an amenable number.

20408132 is a deficient number, since it is larger than the sum of its proper divisors (15424588).

20408132 is a wasteful number, since it uses less digits than its factorization.

20408132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16930 (or 16928 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20408132 is about 4517.5360540897. The cubic root of 20408132 is about 273.2757437002.

Adding to 20408132 its reverse (23180402), we get a palindrome (43588534).

The spelling of 20408132 in words is "twenty million, four hundred eight thousand, one hundred thirty-two".