20433805 has 32 divisors (see below), whose sum is σ = 29767680. Its totient is φ = 13167360.

The previous prime is 20433793. The next prime is 20433811. The reversal of 20433805 is 50833402.

It is not a de Polignac number, because 20433805 - 2¹⁹ = 19909517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20433805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39891 + ... + 40399.

It is an arithmetic number, because the mean of its divisors is an integer number (930240).

Almost surely, 2^20433805 is an apocalyptic number.

It is an amenable number.

20433805 is a deficient number, since it is larger than the sum of its proper divisors (9333875).

20433805 is a wasteful number, since it uses less digits than its factorization.

20433805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20433805 is about 4520.3766435995. The cubic root of 20433805 is about 273.3902873914.

The spelling of 20433805 in words is "twenty million, four hundred thirty-three thousand, eight hundred five".