20880073 has 4 divisors (see below), whose sum is σ = 20925828. Its totient is φ = 20834320.

The previous prime is 20880071. The next prime is 20880077. The reversal of 20880073 is 37008802.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10036224 + 10843849 = 3168^2 + 3293^2 .

It is a cyclic number.

It is not a de Polignac number, because 20880073 - 2¹ = 20880071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20880071) 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, 22186 + ... + 23107.

It is an arithmetic number, because the mean of its divisors is an integer number (5231457).

Almost surely, 2^20880073 is an apocalyptic number.

It is an amenable number.

20880073 is a deficient number, since it is larger than the sum of its proper divisors (45755).

20880073 is an equidigital number, since it uses as much as digits as its factorization.

20880073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45754.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20880073 is about 4569.4718513194. The cubic root of 20880073 is about 275.3662250193.

Adding to 20880073 its reverse (37008802), we get a palindrome (57888875).

The spelling of 20880073 in words is "twenty million, eight hundred eighty thousand, seventy-three".