20321067511 has 8 divisors (see below), whose sum is σ = 21393428400. Its totient is φ = 19248989760.

The previous prime is 20321067497. The next prime is 20321067551. The reversal of 20321067511 is 11576012302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20321067511 - 2¹⁵ = 20321034743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20321067511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321067551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85401 + ... + 218941.

It is an arithmetic number, because the mean of its divisors is an integer number (2674178550).

Almost surely, 2^20321067511 is an apocalyptic number.

20321067511 is a deficient number, since it is larger than the sum of its proper divisors (1072360889).

20321067511 is a wasteful number, since it uses less digits than its factorization.

20321067511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141569.

The product of its (nonzero) digits is 2520, while the sum is 28.

Adding to 20321067511 its reverse (11576012302), we get a palindrome (31897079813).

The spelling of 20321067511 in words is "twenty billion, three hundred twenty-one million, sixty-seven thousand, five hundred eleven".