20965073 has 4 divisors (see below), whose sum is σ = 20976228. Its totient is φ = 20953920.

The previous prime is 20965067. The next prime is 20965079. The reversal of 20965073 is 37056902.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (20965067) and next prime (20965079).

It can be written as a sum of positive squares in 2 ways, for example, as 966289 + 19998784 = 983^2 + 4472^2 .

It is a cyclic number.

It is not a de Polignac number, because 20965073 - 2²⁰ = 19916497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20965079) 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, 1988 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (5244057).

Almost surely, 2^20965073 is an apocalyptic number.

It is an amenable number.

20965073 is a deficient number, since it is larger than the sum of its proper divisors (11155).

20965073 is an equidigital number, since it uses as much as digits as its factorization.

20965073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11154.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20965073 is about 4578.7632609691. The cubic root of 20965073 is about 275.7393788820.

The spelling of 20965073 in words is "twenty million, nine hundred sixty-five thousand, seventy-three".