20910043 has 16 divisors (see below), whose sum is σ = 26171136. Its totient is φ = 16230240.

The previous prime is 20910031. The next prime is 20910067. The reversal of 20910043 is 34001902.

It is a cyclic number.

It is not a de Polignac number, because 20910043 - 2⁵ = 20910011 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 20910043.

It is not an unprimeable number, because it can be changed into a prime (20910023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33805 + ... + 34417.

It is an arithmetic number, because the mean of its divisors is an integer number (1635696).

Almost surely, 2^20910043 is an apocalyptic number.

20910043 is a deficient number, since it is larger than the sum of its proper divisors (5261093).

20910043 is a wasteful number, since it uses less digits than its factorization.

20910043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20910043 is about 4572.7500478377. The cubic root of 20910043 is about 275.4979100701.

Adding to 20910043 its reverse (34001902), we get a palindrome (54911945).

The spelling of 20910043 in words is "twenty million, nine hundred ten thousand, forty-three".