20020011331 has 4 divisors (see below), whose sum is σ = 20121635952. Its totient is φ = 19918386712.

The previous prime is 20020011329. The next prime is 20020011343. The reversal of 20020011331 is 13311002002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13311002002 = 2 ⋅6655501001.

It is a cyclic number.

It is not a de Polignac number, because 20020011331 - 2¹ = 20020011329 is a prime.

It is a super-3 number, since 3×20020011331³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020011301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50812015 + ... + 50812408.

It is an arithmetic number, because the mean of its divisors is an integer number (5030408988).

Almost surely, 2^20020011331 is an apocalyptic number.

20020011331 is a deficient number, since it is larger than the sum of its proper divisors (101624621).

20020011331 is a wasteful number, since it uses less digits than its factorization.

20020011331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101624620.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20020011331 its reverse (13311002002), we get a palindrome (33331013333).

The spelling of 20020011331 in words is "twenty billion, twenty million, eleven thousand, three hundred thirty-one".