20912484 has 12 divisors (see below), whose sum is σ = 48795824. Its totient is φ = 6970824.

The previous prime is 20912477. The next prime is 20912503. The reversal of 20912484 is 48421902.

It is a tau number, because it is divible by the number of its divisors (12).

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, 871342 + ... + 871365.

Almost surely, 2^20912484 is an apocalyptic number.

It is an amenable number.

20912484 is an abundant number, since it is smaller than the sum of its proper divisors (27883340).

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

20912484 is a wasteful number, since it uses less digits than its factorization.

20912484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742714 (or 1742712 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20912484 is about 4573.0169472680. The cubic root of 20912484 is about 275.5086300262.

The spelling of 20912484 in words is "twenty million, nine hundred twelve thousand, four hundred eighty-four".