20796439 has 4 divisors (see below), whose sum is σ = 21700656. Its totient is φ = 19892224.

The previous prime is 20796401. The next prime is 20796449. The reversal of 20796439 is 93469702.

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 20796439 - 2¹³ = 20788247 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 (20796449) 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, 452074 + ... + 452119.

It is an arithmetic number, because the mean of its divisors is an integer number (5425164).

Almost surely, 2^20796439 is an apocalyptic number.

20796439 is a deficient number, since it is larger than the sum of its proper divisors (904217).

20796439 is an equidigital number, since it uses as much as digits as its factorization.

20796439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904216.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20796439 is about 4560.3112832350. The cubic root of 20796439 is about 274.9980782235.

The spelling of 20796439 in words is "twenty million, seven hundred ninety-six thousand, four hundred thirty-nine".