20020311321 has 8 divisors (see below), whose sum is σ = 26695631904. Its totient is φ = 13345932480.

The previous prime is 20020311317. The next prime is 20020311331. The reversal of 20020311321 is 12311302002.

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

It is not a de Polignac number, because 20020311321 - 2² = 20020311317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20020311321.

It is not an unprimeable number, because it can be changed into a prime (20020311331) 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 7 ways as a sum of consecutive naturals, for example, 184240 + ... + 272001.

It is an arithmetic number, because the mean of its divisors is an integer number (3336953988).

Almost surely, 2^20020311321 is an apocalyptic number.

It is an amenable number.

20020311321 is a deficient number, since it is larger than the sum of its proper divisors (6675320583).

20020311321 is a wasteful number, since it uses less digits than its factorization.

20020311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470871.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20020311321 its reverse (12311302002), we get a palindrome (32331613323).

The spelling of 20020311321 in words is "twenty billion, twenty million, three hundred eleven thousand, three hundred twenty-one".