32818021 has 2 divisors, whose sum is σ = 32818022. Its totient is φ = 32818020.

The previous prime is 32818013. The next prime is 32818043. The reversal of 32818021 is 12081823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32615521 + 202500 = 5711^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 32818021 - 2³ = 32818013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32818321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16409010 + 16409011.

It is an arithmetic number, because the mean of its divisors is an integer number (16409011).

Almost surely, 2^32818021 is an apocalyptic number.

It is an amenable number.

32818021 is a deficient number, since it is larger than the sum of its proper divisors (1).

32818021 is an equidigital number, since it uses as much as digits as its factorization.

32818021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 32818021 is about 5728.7015108138. The cubic root of 32818021 is about 320.1627459925.

Adding to 32818021 its reverse (12081823), we get a palindrome (44899844).

The spelling of 32818021 in words is "thirty-two million, eight hundred eighteen thousand, twenty-one".