20796547 has 4 divisors (see below), whose sum is σ = 21137536. Its totient is φ = 20455560.

The previous prime is 20796527. The next prime is 20796551. The reversal of 20796547 is 74569702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74569702 = 2 ⋅37284851.

It is a cyclic number.

It is not a de Polignac number, because 20796547 - 2²³ = 12407939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20796527) 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, 170403 + ... + 170524.

It is an arithmetic number, because the mean of its divisors is an integer number (5284384).

Almost surely, 2^20796547 is an apocalyptic number.

20796547 is a deficient number, since it is larger than the sum of its proper divisors (340989).

20796547 is an equidigital number, since it uses as much as digits as its factorization.

20796547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340988.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 20796547 is about 4560.3231245165. The cubic root of 20796547 is about 274.9985542624.

The spelling of 20796547 in words is "twenty million, seven hundred ninety-six thousand, five hundred forty-seven".