21046327 has 2 divisors, whose sum is σ = 21046328. Its totient is φ = 21046326.

The previous prime is 21046309. The next prime is 21046331. The reversal of 21046327 is 72364012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21046327 - 2¹¹ = 21044279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21046367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10523163 + 10523164.

It is an arithmetic number, because the mean of its divisors is an integer number (10523164).

Almost surely, 2^21046327 is an apocalyptic number.

21046327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21046327 is an equidigital number, since it uses as much as digits as its factorization.

21046327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21046327 is about 4587.6276004052. The cubic root of 21046327 is about 276.0951459054.

The spelling of 21046327 in words is "twenty-one million, forty-six thousand, three hundred twenty-seven".