20965573 has 16 divisors (see below), whose sum is σ = 22913280. Its totient is φ = 19109376.

The previous prime is 20965537. The next prime is 20965577. The reversal of 20965573 is 37556902.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20965573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20965577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89865 + ... + 90097.

It is an arithmetic number, because the mean of its divisors is an integer number (1432080).

Almost surely, 2^20965573 is an apocalyptic number.

It is an amenable number.

20965573 is a deficient number, since it is larger than the sum of its proper divisors (1947707).

20965573 is a wasteful number, since it uses less digits than its factorization.

20965573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 20965573 is about 4578.8178605400. The cubic root of 20965573 is about 275.7415709182.

The spelling of 20965573 in words is "twenty million, nine hundred sixty-five thousand, five hundred seventy-three".