20321311000 has 64 divisors (see below), whose sum is σ = 48357972000. Its totient is φ = 7990729600.

The previous prime is 20321310973. The next prime is 20321311001. The reversal of 20321311000 is 11312302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321311001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113215 + ... + 231214.

Almost surely, 2^20321311000 is an apocalyptic number.

20321311000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321311000 is an abundant number, since it is smaller than the sum of its proper divisors (28036661000).

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

20321311000 is a wasteful number, since it uses less digits than its factorization.

20321311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344509 (or 344495 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20321311000 its reverse (11312302), we get a palindrome (20332623302).

The spelling of 20321311000 in words is "twenty billion, three hundred twenty-one million, three hundred eleven thousand".