20984084 has 12 divisors (see below), whose sum is σ = 40060608. Its totient is φ = 9538200.

The previous prime is 20984071. The next prime is 20984123. The reversal of 20984084 is 48048902.

It is a congruent 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, 238412 + ... + 238499.

It is an arithmetic number, because the mean of its divisors is an integer number (3338384).

Almost surely, 2^20984084 is an apocalyptic number.

It is an amenable number.

20984084 is a deficient number, since it is larger than the sum of its proper divisors (19076524).

20984084 is a wasteful number, since it uses less digits than its factorization.

20984084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476926 (or 476924 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 20984084 is about 4580.8387878204. The cubic root of 20984084 is about 275.8226999630.

It can be divided in two parts, 209 and 84084, that multiplied together give a triangular number (17573556 = T₅₉₂₈).

The spelling of 20984084 in words is "twenty million, nine hundred eighty-four thousand, eighty-four".