20984066 has 4 divisors (see below), whose sum is σ = 31476102. Its totient is φ = 10492032.

The previous prime is 20984039. The next prime is 20984071. The reversal of 20984066 is 66048902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20025625 + 958441 = 4475^2 + 979^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5246015 + ... + 5246018.

Almost surely, 2^20984066 is an apocalyptic number.

20984066 is a deficient number, since it is larger than the sum of its proper divisors (10492036).

20984066 is a wasteful number, since it uses less digits than its factorization.

20984066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10492035.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 20984066 is about 4580.8368231143. The cubic root of 20984066 is about 275.8226210967.

The spelling of 20984066 in words is "twenty million, nine hundred eighty-four thousand, sixty-six".