20601443 has 4 divisors (see below), whose sum is σ = 20950680. Its totient is φ = 20252208.

The previous prime is 20601439. The next prime is 20601473. The reversal of 20601443 is 34410602.

It is a happy number.

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 20601443 - 2² = 20601439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20601473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174530 + ... + 174647.

It is an arithmetic number, because the mean of its divisors is an integer number (5237670).

Almost surely, 2^20601443 is an apocalyptic number.

20601443 is a deficient number, since it is larger than the sum of its proper divisors (349237).

20601443 is an equidigital number, since it uses as much as digits as its factorization.

20601443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349236.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20601443 is about 4538.8812498236. The cubic root of 20601443 is about 274.1358792901.

The spelling of 20601443 in words is "twenty million, six hundred one thousand, four hundred forty-three".