20123232112 has 20 divisors (see below), whose sum is σ = 41282219376. Its totient is φ = 9469756160.

The previous prime is 20123232083. The next prime is 20123232113. The reversal of 20123232112 is 21123232102.

It is a self number, because there is not a number n which added to its sum of digits gives 20123232112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123232113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36990964 + ... + 36991507.

Almost surely, 2^20123232112 is an apocalyptic number.

It is an amenable number.

20123232112 is an abundant number, since it is smaller than the sum of its proper divisors (21158987264).

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

20123232112 is a wasteful number, since it uses less digits than its factorization.

20123232112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73982496 (or 73982490 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20123232112 its reverse (21123232102), we get a palindrome (41246464214).

The spelling of 20123232112 in words is "twenty billion, one hundred twenty-three million, two hundred thirty-two thousand, one hundred twelve".