20683943 has 8 divisors (see below), whose sum is σ = 23680512. Its totient is φ = 17697816.

The previous prime is 20683937. The next prime is 20683961. The reversal of 20683943 is 34938602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20683943 - 2⁶ = 20683879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20683973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246 + ... + 6812.

It is an arithmetic number, because the mean of its divisors is an integer number (2960064).

Almost surely, 2^20683943 is an apocalyptic number.

20683943 is a deficient number, since it is larger than the sum of its proper divisors (2996569).

20683943 is an equidigital number, since it uses as much as digits as its factorization.

20683943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20683943 is about 4547.9603120520. The cubic root of 20683943 is about 274.5013243644.

The spelling of 20683943 in words is "twenty million, six hundred eighty-three thousand, nine hundred forty-three".