20712230 has 64 divisors (see below), whose sum is σ = 47803392. Its totient is φ = 6272640.

The previous prime is 20712227. The next prime is 20712253. The reversal of 20712230 is 3221702.

It is a junction number, because it is equal to n+sod(n) for n = 20712199 and 20712208.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 28127 + ... + 28853.

It is an arithmetic number, because the mean of its divisors is an integer number (746928).

Almost surely, 2^20712230 is an apocalyptic number.

20712230 is an abundant number, since it is smaller than the sum of its proper divisors (27091162).

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

20712230 is a wasteful number, since it uses less digits than its factorization.

20712230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20712230 is about 4551.0691051664. The cubic root of 20712230 is about 274.6264017730.

Adding to 20712230 its reverse (3221702), we get a palindrome (23933932).

The spelling of 20712230 in words is "twenty million, seven hundred twelve thousand, two hundred thirty".