20131123423432 has 64 divisors (see below), whose sum is σ = 43659366912000. Its totient is φ = 8523382455360.

The previous prime is 20131123423343. The next prime is 20131123423441. The reversal of 20131123423432 is 23432432113102.

It is a junction number, because it is equal to n+sod(n) for n = 20131123423394 and 20131123423403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182141707 + ... + 182252197.

It is an arithmetic number, because the mean of its divisors is an integer number (682177608000).

Almost surely, 2^{20131123423432} is an apocalyptic number.

It is an amenable number.

20131123423432 is an abundant number, since it is smaller than the sum of its proper divisors (23528243488568).

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

20131123423432 is a wasteful number, since it uses less digits than its factorization.

20131123423432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149786 (or 149782 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 20131123423432 its reverse (23432432113102), we get a palindrome (43563555536534).

The spelling of 20131123423432 in words is "twenty trillion, one hundred thirty-one billion, one hundred twenty-three million, four hundred twenty-three thousand, four hundred thirty-two".