20123210312 has 16 divisors (see below), whose sum is σ = 37755244800. Its totient is φ = 10055145040.

The previous prime is 20123210309. The next prime is 20123210323. The reversal of 20123210312 is 21301232102.

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 3 ways as a sum of consecutive naturals, for example, 794264 + ... + 819207.

It is an arithmetic number, because the mean of its divisors is an integer number (2359702800).

Almost surely, 2^20123210312 is an apocalyptic number.

It is an amenable number.

20123210312 is a deficient number, since it is larger than the sum of its proper divisors (17632034488).

20123210312 is a wasteful number, since it uses less digits than its factorization.

20123210312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615036 (or 1615032 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20123210312 its reverse (21301232102), we get a palindrome (41424442414).

The spelling of 20123210312 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, three hundred twelve".