20431504023212 has 24 divisors (see below), whose sum is σ = 37872360805104. Its totient is φ = 9611273498112.

The previous prime is 20431504023199. The next prime is 20431504023289. The reversal of 20431504023212 is 21232040513402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55313393 + ... + 55681544.

It is an arithmetic number, because the mean of its divisors is an integer number (1578015033546).

Almost surely, 2^{20431504023212} is an apocalyptic number.

It is an amenable number.

20431504023212 is a deficient number, since it is larger than the sum of its proper divisors (17440856781892).

20431504023212 is a wasteful number, since it uses less digits than its factorization.

20431504023212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110997665 (or 110997663 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 20431504023212 its reverse (21232040513402), we get a palindrome (41663544536614).

The spelling of 20431504023212 in words is "twenty trillion, four hundred thirty-one billion, five hundred four million, twenty-three thousand, two hundred twelve".