20729083 has 4 divisors (see below), whose sum is σ = 20796048. Its totient is φ = 20662120.

The previous prime is 20729077. The next prime is 20729087. The reversal of 20729083 is 38092702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38092702 = 2 ⋅19046351.

It is a cyclic number.

It is not a de Polignac number, because 20729083 - 2⁹ = 20728571 is a prime.

It is a Smith number, since the sum of its digits (31) 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 not an unprimeable number, because it can be changed into a prime (20729087) 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, 33016 + ... + 33637.

It is an arithmetic number, because the mean of its divisors is an integer number (5199012).

Almost surely, 2^20729083 is an apocalyptic number.

20729083 is a deficient number, since it is larger than the sum of its proper divisors (66965).

20729083 is an equidigital number, since it uses as much as digits as its factorization.

20729083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66964.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20729083 is about 4552.9202716498. The cubic root of 20729083 is about 274.7008670207.

The spelling of 20729083 in words is "twenty million, seven hundred twenty-nine thousand, eighty-three".