20984083 has 4 divisors (see below), whose sum is σ = 21149440. Its totient is φ = 20818728.

The previous prime is 20984071. The next prime is 20984123. The reversal of 20984083 is 38048902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20984083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20924083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82488 + ... + 82741.

It is an arithmetic number, because the mean of its divisors is an integer number (5287360).

Almost surely, 2^20984083 is an apocalyptic number.

20984083 is a deficient number, since it is larger than the sum of its proper divisors (165357).

20984083 is a wasteful number, since it uses less digits than its factorization.

20984083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165356.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20984083 is about 4580.8386786701. The cubic root of 20984083 is about 275.8226955815.

The spelling of 20984083 in words is "twenty million, nine hundred eighty-four thousand, eighty-three".