20112321 has 8 divisors (see below), whose sum is σ = 26953344. Its totient is φ = 13339760.

The previous prime is 20112319. The next prime is 20112329. The reversal of 20112321 is 12321102.

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 20112321 - 2¹ = 20112319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20112297 and 20112306.

It is not an unprimeable number, because it can be changed into a prime (20112329) 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, 16425 + ... + 17606.

It is an arithmetic number, because the mean of its divisors is an integer number (3369168).

Almost surely, 2^20112321 is an apocalyptic number.

It is an amenable number.

20112321 is a deficient number, since it is larger than the sum of its proper divisors (6841023).

20112321 is a wasteful number, since it uses less digits than its factorization.

20112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34231.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20112321 is about 4484.6762424951. The cubic root of 20112321 is about 271.9489568651.

Adding to 20112321 its reverse (12321102), we get a palindrome (32433423).

The spelling of 20112321 in words is "twenty million, one hundred twelve thousand, three hundred twenty-one".