20594965 has 4 divisors (see below), whose sum is σ = 24713964. Its totient is φ = 16475968.

The previous prime is 20594963. The next prime is 20594969. The reversal of 20594965 is 56949502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56949502 = 2 ⋅28474751.

It can be written as a sum of positive squares in 2 ways, for example, as 7584516 + 13010449 = 2754^2 + 3607^2 .

It is a cyclic number.

It is not a de Polignac number, because 20594965 - 2¹ = 20594963 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 a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20594963) 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, 2059492 + ... + 2059501.

It is an arithmetic number, because the mean of its divisors is an integer number (6178491).

Almost surely, 2^20594965 is an apocalyptic number.

It is an amenable number.

20594965 is a deficient number, since it is larger than the sum of its proper divisors (4118999).

20594965 is an equidigital number, since it uses as much as digits as its factorization.

20594965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118998.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 20594965 is about 4538.1675817449. The cubic root of 20594965 is about 274.1071428177.

The spelling of 20594965 in words is "twenty million, five hundred ninety-four thousand, nine hundred sixty-five".