20408484 has 24 divisors (see below), whose sum is σ = 47702368. Its totient is φ = 6791040.

The previous prime is 20408471. The next prime is 20408533. The reversal of 20408484 is 48480402.

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, 8364 + ... + 10524.

Almost surely, 2^20408484 is an apocalyptic number.

It is an amenable number.

20408484 is an abundant number, since it is smaller than the sum of its proper divisors (27293884).

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

20408484 is a wasteful number, since it uses less digits than its factorization.

20408484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 20408484 is about 4517.5750132123. The cubic root of 20408484 is about 273.2773148470.

Adding to 20408484 its reverse (48480402), we get a palindrome (68888886).

The spelling of 20408484 in words is "twenty million, four hundred eight thousand, four hundred eighty-four".