20468983 has 4 divisors (see below), whose sum is σ = 21174840. Its totient is φ = 19763128.

The previous prime is 20468957. The next prime is 20468999. The reversal of 20468983 is 38986402.

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

It is a cyclic number.

It is not a de Polignac number, because 20468983 - 2⁵ = 20468951 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20468953) 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, 352885 + ... + 352942.

It is an arithmetic number, because the mean of its divisors is an integer number (5293710).

Almost surely, 2^20468983 is an apocalyptic number.

20468983 is a deficient number, since it is larger than the sum of its proper divisors (705857).

20468983 is an equidigital number, since it uses as much as digits as its factorization.

20468983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705856.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 20468983 is about 4524.2660178199. The cubic root of 20468983 is about 273.5470832806.

The spelling of 20468983 in words is "twenty million, four hundred sixty-eight thousand, nine hundred eighty-three".