20706230 has 16 divisors (see below), whose sum is σ = 38181024. Its totient is φ = 8080320.

The previous prime is 20706209. The next prime is 20706239. The reversal of 20706230 is 3260702.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24842 + ... + 25661.

It is an arithmetic number, because the mean of its divisors is an integer number (2386314).

Almost surely, 2^20706230 is an apocalyptic number.

20706230 is a deficient number, since it is larger than the sum of its proper divisors (17474794).

20706230 is a wasteful number, since it uses less digits than its factorization.

20706230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50551.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20706230 is about 4550.4098716489. The cubic root of 20706230 is about 274.5998809276.

Adding to 20706230 its reverse (3260702), we get a palindrome (23966932).

The spelling of 20706230 in words is "twenty million, seven hundred six thousand, two hundred thirty".