20984992 has 24 divisors (see below), whose sum is σ = 47216736. Its totient is φ = 8993472.

The previous prime is 20984963. The next prime is 20985001. The reversal of 20984992 is 29948902.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46618 + ... + 47065.

It is an arithmetic number, because the mean of its divisors is an integer number (1967364).

Almost surely, 2^20984992 is an apocalyptic number.

It is an amenable number.

20984992 is an abundant number, since it is smaller than the sum of its proper divisors (26231744).

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

20984992 is an equidigital number, since it uses as much as digits as its factorization.

20984992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93700 (or 93692 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 20984992 is about 4580.9378952350. The cubic root of 20984992 is about 275.8266782702.

The spelling of 20984992 in words is "twenty million, nine hundred eighty-four thousand, nine hundred ninety-two".