20431334012 has 12 divisors (see below), whose sum is σ = 35755836480. Its totient is φ = 10215380736.

The previous prime is 20431333981. The next prime is 20431334017. The reversal of 20431334012 is 21043313402.

It is a super-2 number, since 2×20431334012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431334017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233564 + ... + 308892.

It is an arithmetic number, because the mean of its divisors is an integer number (2979653040).

Almost surely, 2^20431334012 is an apocalyptic number.

It is an amenable number.

20431334012 is a deficient number, since it is larger than the sum of its proper divisors (15324502468).

20431334012 is a wasteful number, since it uses less digits than its factorization.

20431334012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143140 (or 143138 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20431334012 its reverse (21043313402), we get a palindrome (41474647414).

The spelling of 20431334012 in words is "twenty billion, four hundred thirty-one million, three hundred thirty-four thousand, twelve".