20943683 has 2 divisors, whose sum is σ = 20943684. Its totient is φ = 20943682.

The previous prime is 20943667. The next prime is 20943721. The reversal of 20943683 is 38634902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20943683 - 2⁴ = 20943667 is a prime.

It is not a weakly prime, because it can be changed into another prime (20943613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10471841 + 10471842.

It is an arithmetic number, because the mean of its divisors is an integer number (10471842).

Almost surely, 2^20943683 is an apocalyptic number.

20943683 is a deficient number, since it is larger than the sum of its proper divisors (1).

20943683 is an equidigital number, since it uses as much as digits as its factorization.

20943683 is an evil number, because the sum of its binary digits is even.

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

The square root of 20943683 is about 4576.4268813125. The cubic root of 20943683 is about 275.6455709199.

The spelling of 20943683 in words is "twenty million, nine hundred forty-three thousand, six hundred eighty-three".