20483643 has 4 divisors (see below), whose sum is σ = 27311528. Its totient is φ = 13655760.

The previous prime is 20483627. The next prime is 20483677. The reversal of 20483643 is 34638402.

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

It is not a de Polignac number, because 20483643 - 2⁴ = 20483627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20483643.

It is not an unprimeable number, because it can be changed into a prime (20983643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3413938 + ... + 3413943.

It is an arithmetic number, because the mean of its divisors is an integer number (6827882).

Almost surely, 2^20483643 is an apocalyptic number.

20483643 is a deficient number, since it is larger than the sum of its proper divisors (6827885).

20483643 is an equidigital number, since it uses as much as digits as its factorization.

20483643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6827884.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 20483643 is about 4525.8858801344. The cubic root of 20483643 is about 273.6123730127.

The spelling of 20483643 in words is "twenty million, four hundred eighty-three thousand, six hundred forty-three".