32618021 has 2 divisors, whose sum is σ = 32618022. Its totient is φ = 32618020.

The previous prime is 32618017. The next prime is 32618023. The reversal of 32618021 is 12081623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32615521 + 2500 = 5711^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 32618021 - 2² = 32618017 is a prime.

Together with 32618023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32618023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16309010 + 16309011.

It is an arithmetic number, because the mean of its divisors is an integer number (16309011).

Almost surely, 2^32618021 is an apocalyptic number.

It is an amenable number.

32618021 is a deficient number, since it is larger than the sum of its proper divisors (1).

32618021 is an equidigital number, since it uses as much as digits as its factorization.

32618021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 32618021 is about 5711.2188716595. The cubic root of 32618021 is about 319.5110403601.

Adding to 32618021 its reverse (12081623), we get a palindrome (44699644).

The spelling of 32618021 in words is "thirty-two million, six hundred eighteen thousand, twenty-one".