20983724 has 6 divisors (see below), whose sum is σ = 36721524. Its totient is φ = 10491860.

The previous prime is 20983723. The next prime is 20983727. The reversal of 20983724 is 42738902.

It is not an unprimeable number, because it can be changed into a prime (20983723) 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 as a sum of consecutive naturals, namely, 2622962 + ... + 2622969.

It is an arithmetic number, because the mean of its divisors is an integer number (6120254).

Almost surely, 2^20983724 is an apocalyptic number.

It is an amenable number.

20983724 is a deficient number, since it is larger than the sum of its proper divisors (15737800).

20983724 is a wasteful number, since it uses less digits than its factorization.

20983724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245935 (or 5245933 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20983724 is about 4580.7994935382. The cubic root of 20983724 is about 275.8211226288.

The spelling of 20983724 in words is "twenty million, nine hundred eighty-three thousand, seven hundred twenty-four".