20816706 has 16 divisors (see below), whose sum is σ = 42046848. Its totient is φ = 6870000.

The previous prime is 20816701. The next prime is 20816759. The reversal of 20816706 is 60761802.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20816701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16570 + ... + 17781.

It is an arithmetic number, because the mean of its divisors is an integer number (2627928).

Almost surely, 2^20816706 is an apocalyptic number.

20816706 is an abundant number, since it is smaller than the sum of its proper divisors (21230142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20816706 is a wasteful number, since it uses less digits than its factorization.

20816706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34457.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20816706 is about 4562.5328491968. The cubic root of 20816706 is about 275.0873815978.

The spelling of 20816706 in words is "twenty million, eight hundred sixteen thousand, seven hundred six".