20321220000 has 120 divisors (see below), whose sum is σ = 66657862656. Its totient is φ = 5418976000.

The previous prime is 20321219881. The next prime is 20321220013. The reversal of 20321220000 is 2212302.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109344 + ... + 229343.

Almost surely, 2^20321220000 is an apocalyptic number.

20321220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321220000 is an abundant number, since it is smaller than the sum of its proper divisors (46336642656).

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

20321220000 is an equidigital number, since it uses as much as digits as its factorization.

20321220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338720 (or 338697 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20321220000 its reverse (2212302), we get a palindrome (20323432302).

The spelling of 20321220000 in words is "twenty billion, three hundred twenty-one million, two hundred twenty thousand".