20423403231032 has 32 divisors (see below), whose sum is σ = 40910980569600. Its totient is φ = 9529851934944.

The previous prime is 20423403230987. The next prime is 20423403231037. The reversal of 20423403231032 is 23013230432402.

It is a junction number, because it is equal to n+sod(n) for n = 20423403230986 and 20423403231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423403231037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002709928 + ... + 1002730295.

It is an arithmetic number, because the mean of its divisors is an integer number (1278468142800).

Almost surely, 2^{20423403231032} is an apocalyptic number.

It is an amenable number.

20423403231032 is an abundant number, since it is smaller than the sum of its proper divisors (20487577338568).

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

20423403231032 is a wasteful number, since it uses less digits than its factorization.

20423403231032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005440315 (or 2005440311 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 20423403231032 its reverse (23013230432402), we get a palindrome (43436633663434).

The spelling of 20423403231032 in words is "twenty trillion, four hundred twenty-three billion, four hundred three million, two hundred thirty-one thousand, thirty-two".