20983730 has 16 divisors (see below), whose sum is σ = 38335680. Its totient is φ = 8267952.

The previous prime is 20983727. The next prime is 20983741. The reversal of 20983730 is 3738902.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 14990 + ... + 16329.

It is an arithmetic number, because the mean of its divisors is an integer number (2395980).

Almost surely, 2^20983730 is an apocalyptic number.

20983730 is a deficient number, since it is larger than the sum of its proper divisors (17351950).

20983730 is a wasteful number, since it uses less digits than its factorization.

20983730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31393.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20983730 is about 4580.8001484457. The cubic root of 20983730 is about 275.8211489178.

The spelling of 20983730 in words is "twenty million, nine hundred eighty-three thousand, seven hundred thirty".