20984650 has 12 divisors (see below), whose sum is σ = 39031542. Its totient is φ = 8393840.

The previous prime is 20984633. The next prime is 20984729. The reversal of 20984650 is 5648902.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18844281 + 2140369 = 4341^2 + 1463^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209797 + ... + 209896.

Almost surely, 2^20984650 is an apocalyptic number.

20984650 is a deficient number, since it is larger than the sum of its proper divisors (18046892).

20984650 is a wasteful number, since it uses less digits than its factorization.

20984650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419705 (or 419700 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 20984650 is about 4580.9005664825. The cubic root of 20984650 is about 275.8251798464.

The spelling of 20984650 in words is "twenty million, nine hundred eighty-four thousand, six hundred fifty".