20339806 has 4 divisors (see below), whose sum is σ = 30509712. Its totient is φ = 10169902.

The previous prime is 20339801. The next prime is 20339807. The reversal of 20339806 is 60893302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20339801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5084950 + ... + 5084953.

It is an arithmetic number, because the mean of its divisors is an integer number (7627428).

Almost surely, 2^20339806 is an apocalyptic number.

20339806 is a deficient number, since it is larger than the sum of its proper divisors (10169906).

20339806 is a wasteful number, since it uses less digits than its factorization.

20339806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10169905.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 20339806 is about 4509.9674056472. The cubic root of 20339806 is about 272.9704288883.

The spelling of 20339806 in words is "twenty million, three hundred thirty-nine thousand, eight hundred six".