20984116 has 6 divisors (see below), whose sum is σ = 36722210. Its totient is φ = 10492056.

The previous prime is 20984071. The next prime is 20984123. The reversal of 20984116 is 61148902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12574116 + 8410000 = 3546^2 + 2900^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2623011 + ... + 2623018.

Almost surely, 2^20984116 is an apocalyptic number.

It is an amenable number.

20984116 is a deficient number, since it is larger than the sum of its proper divisors (15738094).

20984116 is a wasteful number, since it uses less digits than its factorization.

20984116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246033 (or 5246031 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 20984116 is about 4580.8422806292. The cubic root of 20984116 is about 275.8228401696.

It can be divided in two parts, 2098 and 4116, that multiplied together give a palindrome (8635368).

The spelling of 20984116 in words is "twenty million, nine hundred eighty-four thousand, one hundred sixteen".