20550984 has 32 divisors (see below), whose sum is σ = 52768320. Its totient is φ = 6664896.

The previous prime is 20550941. The next prime is 20550997. The reversal of 20550984 is 48905502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10684 + ... + 12459.

It is an arithmetic number, because the mean of its divisors is an integer number (1649010).

Almost surely, 2^20550984 is an apocalyptic number.

20550984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20550984 is an abundant number, since it is smaller than the sum of its proper divisors (32217336).

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

20550984 is a wasteful number, since it uses less digits than its factorization.

20550984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23189 (or 23185 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 20550984 is about 4533.3193137038. The cubic root of 20550984 is about 273.9118831504.

The spelling of 20550984 in words is "twenty million, five hundred fifty thousand, nine hundred eighty-four".