20512320001 has 8 divisors (see below), whose sum is σ = 20935111208. Its totient is φ = 20092320000.

The previous prime is 20512319987. The next prime is 20512320007. The reversal of 20512320001 is 10002321502.

It can be written as a sum of positive squares in 4 ways, for example, as 331276401 + 20181043600 = 18201^2 + 142060^2 .

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 20512320001 - 2⁷ = 20512319873 is a prime.

It is a super-3 number, since 3×20512320001³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20512320007) 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, 682950 + ... + 712351.

It is an arithmetic number, because the mean of its divisors is an integer number (2616888901).

Almost surely, 2^20512320001 is an apocalyptic number.

It is an amenable number.

20512320001 is a deficient number, since it is larger than the sum of its proper divisors (422791207).

20512320001 is a wasteful number, since it uses less digits than its factorization.

20512320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395603.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 20512320001 its reverse (10002321502), we get a palindrome (30514641503).

The spelling of 20512320001 in words is "twenty billion, five hundred twelve million, three hundred twenty thousand, one".