20111223230 has 32 divisors (see below), whose sum is σ = 43170430464. Its totient is φ = 6595481376.

The previous prime is 20111223217. The next prime is 20111223233. The reversal of 20111223230 is 3232211102.

It is a super-3 number, since 3×20111223230³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20111223199 and 20111223208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111223233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6244112 + ... + 6247331.

It is an arithmetic number, because the mean of its divisors is an integer number (1349075952).

Almost surely, 2^20111223230 is an apocalyptic number.

20111223230 is an abundant number, since it is smaller than the sum of its proper divisors (23059207234).

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

20111223230 is a wasteful number, since it uses less digits than its factorization.

20111223230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12491480.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20111223230 its reverse (3232211102), we get a palindrome (23343434332).

The spelling of 20111223230 in words is "twenty billion, one hundred eleven million, two hundred twenty-three thousand, two hundred thirty".