20112433123 has 32 divisors (see below), whose sum is σ = 21426462720. Its totient is φ = 18859024800.

The previous prime is 20112433051. The next prime is 20112433139. The reversal of 20112433123 is 32133421102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112433123 is a prime.

It is a super-2 number, since 2×20112433123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112433094 and 20112433103.

It is not an unprimeable number, because it can be changed into a prime (20112430123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19135948 + ... + 19136998.

It is an arithmetic number, because the mean of its divisors is an integer number (669576960).

Almost surely, 2^20112433123 is an apocalyptic number.

20112433123 is a deficient number, since it is larger than the sum of its proper divisors (1314029597).

20112433123 is a wasteful number, since it uses less digits than its factorization.

20112433123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20112433123 its reverse (32133421102), we get a palindrome (52245854225).

The spelling of 20112433123 in words is "twenty billion, one hundred twelve million, four hundred thirty-three thousand, one hundred twenty-three".