20984750 has 16 divisors (see below), whose sum is σ = 39283920. Its totient is φ = 8393800.

The previous prime is 20984729. The next prime is 20984753. The reversal of 20984750 is 5748902.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20984750.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20984753) by changing a digit.

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, 41720 + ... + 42219.

It is an arithmetic number, because the mean of its divisors is an integer number (2455245).

Almost surely, 2^20984750 is an apocalyptic number.

20984750 is a deficient number, since it is larger than the sum of its proper divisors (18299170).

20984750 is an equidigital number, since it uses as much as digits as its factorization.

20984750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83956 (or 83946 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20984750 is about 4580.9114813539. The cubic root of 20984750 is about 275.8256179837.

The spelling of 20984750 in words is "twenty million, nine hundred eighty-four thousand, seven hundred fifty".