20055806 has 8 divisors (see below), whose sum is σ = 30817584. Its totient is φ = 9783280.

The previous prime is 20055803. The next prime is 20055821. The reversal of 20055806 is 60855002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122210 + ... + 122373.

It is an arithmetic number, because the mean of its divisors is an integer number (3852198).

Almost surely, 2^20055806 is an apocalyptic number.

20055806 is a deficient number, since it is larger than the sum of its proper divisors (10761778).

20055806 is a wasteful number, since it uses less digits than its factorization.

20055806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244626.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20055806 is about 4478.3709091588. The cubic root of 20055806 is about 271.6939951849.

The spelling of 20055806 in words is "twenty million, fifty-five thousand, eight hundred six".