32318021 has 2 divisors, whose sum is σ = 32318022. Its totient is φ = 32318020.

The previous prime is 32318009. The next prime is 32318023. The reversal of 32318021 is 12081323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 801025 = 5614^2 + 895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32318021 is a prime.

Together with 32318023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 32317984 and 32318002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32318023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16159010 + 16159011.

It is an arithmetic number, because the mean of its divisors is an integer number (16159011).

Almost surely, 2^32318021 is an apocalyptic number.

It is an amenable number.

32318021 is a deficient number, since it is larger than the sum of its proper divisors (1).

32318021 is an equidigital number, since it uses as much as digits as its factorization.

32318021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 32318021 is about 5684.8941063137. The cubic root of 32318021 is about 318.5284680877.

Adding to 32318021 its reverse (12081323), we get a palindrome (44399344).

The spelling of 32318021 in words is "thirty-two million, three hundred eighteen thousand, twenty-one".