20605343 has 16 divisors (see below), whose sum is σ = 23950080. Its totient is φ = 17520000.

The previous prime is 20605339. The next prime is 20605349. The reversal of 20605343 is 34350602.

It is a cyclic number.

It is not a de Polignac number, because 20605343 - 2² = 20605339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605349) 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, 46718 + ... + 47156.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^20605343 is an apocalyptic number.

20605343 is a deficient number, since it is larger than the sum of its proper divisors (3344737).

20605343 is a wasteful number, since it uses less digits than its factorization.

20605343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718.

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

The square root of 20605343 is about 4539.3108507790. The cubic root of 20605343 is about 274.1531768240.

Adding to 20605343 its reverse (34350602), we get a palindrome (54955945).

The spelling of 20605343 in words is "twenty million, six hundred five thousand, three hundred forty-three".