20796539 has 4 divisors (see below), whose sum is σ = 21089520. Its totient is φ = 20503560.

The previous prime is 20796527. The next prime is 20796551. The reversal of 20796539 is 93569702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93569702 = 2 ⋅46784851.

It is an interprime number because it is at equal distance from previous prime (20796527) and next prime (20796551).

It is a cyclic number.

It is not a de Polignac number, because 20796539 - 2⁸ = 20796283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20796496 and 20796505.

It is not an unprimeable number, because it can be changed into a prime (20796239) 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, 146384 + ... + 146525.

It is an arithmetic number, because the mean of its divisors is an integer number (5272380).

Almost surely, 2^20796539 is an apocalyptic number.

20796539 is a deficient number, since it is larger than the sum of its proper divisors (292981).

20796539 is an equidigital number, since it uses as much as digits as its factorization.

20796539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292980.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 20796539 is about 4560.3222473856. The cubic root of 20796539 is about 274.9985190003.

The spelling of 20796539 in words is "twenty million, seven hundred ninety-six thousand, five hundred thirty-nine".