20766343 has 4 divisors (see below), whose sum is σ = 22363768. Its totient is φ = 19168920.

The previous prime is 20766341. The next prime is 20766359. The reversal of 20766343 is 34366702.

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 20766343 - 2¹ = 20766341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766341) 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, 798693 + ... + 798718.

It is an arithmetic number, because the mean of its divisors is an integer number (5590942).

Almost surely, 2^20766343 is an apocalyptic number.

20766343 is a deficient number, since it is larger than the sum of its proper divisors (1597425).

20766343 is a wasteful number, since it uses less digits than its factorization.

20766343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597424.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 20766343 is about 4557.0103137913. The cubic root of 20766343 is about 274.8653577803.

The spelling of 20766343 in words is "twenty million, seven hundred sixty-six thousand, three hundred forty-three".