20730232 has 16 divisors (see below), whose sum is σ = 39362400. Its totient is φ = 10233600.

The previous prime is 20730217. The next prime is 20730233. The reversal of 20730232 is 23203702.

It is a happy number.

It is a super-3 number, since 3×20730232³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15769 + ... + 17032.

It is an arithmetic number, because the mean of its divisors is an integer number (2460150).

Almost surely, 2^20730232 is an apocalyptic number.

It is an amenable number.

20730232 is a deficient number, since it is larger than the sum of its proper divisors (18632168).

20730232 is a wasteful number, since it uses less digits than its factorization.

20730232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32886 (or 32882 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 20730232 is about 4553.0464526512. The cubic root of 20730232 is about 274.7059424255.

Adding to 20730232 its reverse (23203702), we get a palindrome (43933934).

The spelling of 20730232 in words is "twenty million, seven hundred thirty thousand, two hundred thirty-two".