20523230 has 64 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 6148224.

The previous prime is 20523227. The next prime is 20523241. The reversal of 20523230 is 3232502.

It is a super-3 number, since 3×20523230³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20523199 and 20523208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16697 + ... + 17883.

It is an arithmetic number, because the mean of its divisors is an integer number (748440).

Almost surely, 2^20523230 is an apocalyptic number.

20523230 is an abundant number, since it is smaller than the sum of its proper divisors (27376930).

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

20523230 is a wasteful number, since it uses less digits than its factorization.

20523230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20523230 is about 4530.2571670933. The cubic root of 20523230 is about 273.7885220631.

Adding to 20523230 its reverse (3232502), we get a palindrome (23755732).

The spelling of 20523230 in words is "twenty million, five hundred twenty-three thousand, two hundred thirty".