20710230 has 16 divisors (see below), whose sum is σ = 49704624. Its totient is φ = 5522720.

The previous prime is 20710213. The next prime is 20710231. The reversal of 20710230 is 3201702.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710231) 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 7 ways as a sum of consecutive naturals, for example, 345141 + ... + 345200.

It is an arithmetic number, because the mean of its divisors is an integer number (3106539).

Almost surely, 2^20710230 is an apocalyptic number.

20710230 is an abundant number, since it is smaller than the sum of its proper divisors (28994394).

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

20710230 is a wasteful number, since it uses less digits than its factorization.

20710230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690351.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 20710230 is about 4550.8493712713. The cubic root of 20710230 is about 274.6175620604.

Adding to 20710230 its reverse (3201702), we get a palindrome (23911932).

The spelling of 20710230 in words is "twenty million, seven hundred ten thousand, two hundred thirty".