20321440204312 has 32 divisors (see below), whose sum is σ = 42034498742880. Its totient is φ = 9150367069440.

The previous prime is 20321440204297. The next prime is 20321440204321. The reversal of 20321440204312 is 21340204412302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2382903828 + ... + 2382912355.

It is an arithmetic number, because the mean of its divisors is an integer number (1313578085715).

Almost surely, 2^{20321440204312} is an apocalyptic number.

It is an amenable number.

20321440204312 is an abundant number, since it is smaller than the sum of its proper divisors (21713058538568).

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

20321440204312 is a wasteful number, since it uses less digits than its factorization.

20321440204312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765816243 (or 4765816239 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20321440204312 its reverse (21340204412302), we get a palindrome (41661644616614).

The spelling of 20321440204312 in words is "twenty trillion, three hundred twenty-one billion, four hundred forty million, two hundred four thousand, three hundred twelve".