20327121 has 12 divisors (see below), whose sum is σ = 31088772. Its totient is φ = 12754176.

The previous prime is 20327117. The next prime is 20327123. The reversal of 20327121 is 12172302.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 1742400 = 4311^2 + 1320^2 .

It is not a de Polignac number, because 20327121 - 2² = 20327117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20327094 and 20327103.

It is not an unprimeable number, because it can be changed into a prime (20327123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66276 + ... + 66581.

It is an arithmetic number, because the mean of its divisors is an integer number (2590731).

Almost surely, 2^20327121 is an apocalyptic number.

It is an amenable number.

20327121 is a deficient number, since it is larger than the sum of its proper divisors (10761651).

20327121 is a wasteful number, since it uses less digits than its factorization.

20327121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132880 (or 132877 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20327121 is about 4508.5608568589. The cubic root of 20327121 is about 272.9136707270.

Adding to 20327121 its reverse (12172302), we get a palindrome (32499423).

The spelling of 20327121 in words is "twenty million, three hundred twenty-seven thousand, one hundred twenty-one".