20973595 has 4 divisors (see below), whose sum is σ = 25168320. Its totient is φ = 16778872.

The previous prime is 20973593. The next prime is 20973599. The reversal of 20973595 is 59537902.

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

It is a cyclic number.

It is not a de Polignac number, because 20973595 - 2¹ = 20973593 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20973593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2097355 + ... + 2097364.

It is an arithmetic number, because the mean of its divisors is an integer number (6292080).

Almost surely, 2^20973595 is an apocalyptic number.

20973595 is a deficient number, since it is larger than the sum of its proper divisors (4194725).

20973595 is an equidigital number, since it uses as much as digits as its factorization.

20973595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194724.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 20973595 is about 4579.6937670547. The cubic root of 20973595 is about 275.7767351820.

The spelling of 20973595 in words is "twenty million, nine hundred seventy-three thousand, five hundred ninety-five".