20228706 has 24 divisors (see below), whose sum is σ = 44763264. Its totient is φ = 6599160.

The previous prime is 20228701. The next prime is 20228713. The reversal of 20228706 is 60782202.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20228706.

It is not an unprimeable number, because it can be changed into a prime (20228701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11110 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (1865136).

Almost surely, 2^20228706 is an apocalyptic number.

20228706 is an abundant number, since it is smaller than the sum of its proper divisors (24534558).

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

20228706 is a wasteful number, since it uses less digits than its factorization.

20228706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23966 (or 23963 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20228706 is about 4497.6333776776. The cubic root of 20228706 is about 272.4725152539.

The spelling of 20228706 in words is "twenty million, two hundred twenty-eight thousand, seven hundred six".