21327067 has 2 divisors, whose sum is σ = 21327068. Its totient is φ = 21327066.

The previous prime is 21327043. The next prime is 21327071. The reversal of 21327067 is 76072312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21327067 - 2⁷ = 21326939 is a prime.

It is not a weakly prime, because it can be changed into another prime (21321067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10663533 + 10663534.

It is an arithmetic number, because the mean of its divisors is an integer number (10663534).

Almost surely, 2^21327067 is an apocalyptic number.

21327067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21327067 is an equidigital number, since it uses as much as digits as its factorization.

21327067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 21327067 is about 4618.1237532141. The cubic root of 21327067 is about 277.3173518756.

Adding to 21327067 its reverse (76072312), we get a palindrome (97399379).

The spelling of 21327067 in words is "twenty-one million, three hundred twenty-seven thousand, sixty-seven".