20213321321 has 8 divisors (see below), whose sum is σ = 20618116800. Its totient is φ = 19811558448.

The previous prime is 20213321273. The next prime is 20213321327. The reversal of 20213321321 is 12312331202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213321321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213321293 and 20213321302.

It is not an unprimeable number, because it can be changed into a prime (20213321327) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 744686 + ... + 771351.

It is an arithmetic number, because the mean of its divisors is an integer number (2577264600).

Almost surely, 2^20213321321 is an apocalyptic number.

It is an amenable number.

20213321321 is a deficient number, since it is larger than the sum of its proper divisors (404795479).

20213321321 is a wasteful number, since it uses less digits than its factorization.

20213321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516303.

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

Adding to 20213321321 its reverse (12312331202), we get a palindrome (32525652523).

The spelling of 20213321321 in words is "twenty billion, two hundred thirteen million, three hundred twenty-one thousand, three hundred twenty-one".