20703043 has 4 divisors (see below), whose sum is σ = 20717928. Its totient is φ = 20688160.

The previous prime is 20703031. The next prime is 20703079. The reversal of 20703043 is 34030702.

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 20703043 - 2²¹ = 18605891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20703043.

It is not an unprimeable number, because it can be changed into a prime (20703143) 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, 5113 + ... + 8218.

It is an arithmetic number, because the mean of its divisors is an integer number (5179482).

Almost surely, 2^20703043 is an apocalyptic number.

20703043 is a deficient number, since it is larger than the sum of its proper divisors (14885).

20703043 is a wasteful number, since it uses less digits than its factorization.

20703043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14884.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 20703043 is about 4550.0596699384. The cubic root of 20703043 is about 274.5857918552.

Adding to 20703043 its reverse (34030702), we get a palindrome (54733745).

The spelling of 20703043 in words is "twenty million, seven hundred three thousand, forty-three".