20312132321 has 32 divisors (see below), whose sum is σ = 23688806400. Its totient is φ = 17249356800.

The previous prime is 20312132317. The next prime is 20312132329. The reversal of 20312132321 is 12323121302.

It is not a de Polignac number, because 20312132321 - 2² = 20312132317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20312132293 and 20312132302.

It is not an unprimeable number, because it can be changed into a prime (20312132329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1757600 + ... + 1769118.

It is an arithmetic number, because the mean of its divisors is an integer number (740275200).

Almost surely, 2^20312132321 is an apocalyptic number.

It is an amenable number.

20312132321 is a deficient number, since it is larger than the sum of its proper divisors (3376674079).

20312132321 is a wasteful number, since it uses less digits than its factorization.

20312132321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11729.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20312132321 its reverse (12323121302), we get a palindrome (32635253623).

The spelling of 20312132321 in words is "twenty billion, three hundred twelve million, one hundred thirty-two thousand, three hundred twenty-one".