20020801321 has 4 divisors (see below), whose sum is σ = 20035513044. Its totient is φ = 20006089600.

The previous prime is 20020801319. The next prime is 20020801379. The reversal of 20020801321 is 12310802002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13868595225 + 6152206096 = 117765^2 + 78436^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020801321 - 2¹ = 20020801319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020801721) 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 3 ways as a sum of consecutive naturals, for example, 7353820 + ... + 7356541.

It is an arithmetic number, because the mean of its divisors is an integer number (5008878261).

Almost surely, 2^20020801321 is an apocalyptic number.

It is an amenable number.

20020801321 is a deficient number, since it is larger than the sum of its proper divisors (14711723).

20020801321 is a wasteful number, since it uses less digits than its factorization.

20020801321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14711722.

The product of its (nonzero) digits is 192, while the sum is 19.

The spelling of 20020801321 in words is "twenty billion, twenty million, eight hundred one thousand, three hundred twenty-one".