20605334 has 4 divisors (see below), whose sum is σ = 30908004. Its totient is φ = 10302666.

The previous prime is 20605327. The next prime is 20605339. The reversal of 20605334 is 43350602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43350602 = 2 ⋅21675301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605339) 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 as a sum of consecutive naturals, namely, 5151332 + ... + 5151335.

It is an arithmetic number, because the mean of its divisors is an integer number (7727001).

Almost surely, 2^20605334 is an apocalyptic number.

20605334 is a deficient number, since it is larger than the sum of its proper divisors (10302670).

20605334 is a wasteful number, since it uses less digits than its factorization.

20605334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10302669.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20605334 is about 4539.3098594390. The cubic root of 20605334 is about 274.1531369091.

Adding to 20605334 its reverse (43350602), we get a palindrome (63955936).

The spelling of 20605334 in words is "twenty million, six hundred five thousand, three hundred thirty-four".