20323121 has 8 divisors (see below), whose sum is σ = 25013184. Its totient is φ = 16079760.

The previous prime is 20323091. The next prime is 20323139. The reversal of 20323121 is 12132302.

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 20323121 - 2⁶ = 20323057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20323096 and 20323105.

It is not an unprimeable number, because it can be changed into a prime (20323151) 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, 111575 + ... + 111756.

It is an arithmetic number, because the mean of its divisors is an integer number (3126648).

Almost surely, 2^20323121 is an apocalyptic number.

It is an amenable number.

20323121 is a deficient number, since it is larger than the sum of its proper divisors (4690063).

20323121 is a wasteful number, since it uses less digits than its factorization.

20323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223351.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20323121 is about 4508.1172345005. The cubic root of 20323121 is about 272.8957681049.

Adding to 20323121 its reverse (12132302), we get a palindrome (32455423).

The spelling of 20323121 in words is "twenty million, three hundred twenty-three thousand, one hundred twenty-one".