321400202020 has 48 divisors (see below), whose sum is σ = 677428800048. Its totient is φ = 128086801920.

The previous prime is 321400202017. The next prime is 321400202059. The reversal of 321400202020 is 20202004123.

It can be written as a sum of positive squares in 8 ways, for example, as 18917801764 + 302482400256 = 137542^2 + 549984^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321400201985 and 321400202003.

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 15 ways as a sum of consecutive naturals, for example, 7595562 + ... + 7637758.

It is an arithmetic number, because the mean of its divisors is an integer number (14113100001).

Almost surely, 2^321400202020 is an apocalyptic number.

It is an amenable number.

321400202020 is an abundant number, since it is smaller than the sum of its proper divisors (356028598028).

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

321400202020 is a wasteful number, since it uses less digits than its factorization.

321400202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43600 (or 43598 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 321400202020 its reverse (20202004123), we get a palindrome (341602206143).

The spelling of 321400202020 in words is "three hundred twenty-one billion, four hundred million, two hundred two thousand, twenty".