20806706 has 8 divisors (see below), whose sum is σ = 31252080. Its totient is φ = 10389348.

The previous prime is 20806699. The next prime is 20806727. The reversal of 20806706 is 60760802.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5036 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (3906510).

Almost surely, 2^20806706 is an apocalyptic number.

20806706 is a deficient number, since it is larger than the sum of its proper divisors (10445374).

20806706 is a wasteful number, since it uses less digits than its factorization.

20806706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14008.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20806706 is about 4561.4368350335. The cubic root of 20806706 is about 275.0433254053.

It can be divided in two parts, 20806 and 706, that added together give a palindrome (21512).

The spelling of 20806706 in words is "twenty million, eight hundred six thousand, seven hundred six".