21382327 has 2 divisors, whose sum is σ = 21382328. Its totient is φ = 21382326.

The previous prime is 21382307. The next prime is 21382331. The reversal of 21382327 is 72328312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21382327 - 2¹⁹ = 20858039 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21382295 and 21382304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21382307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10691163 + 10691164.

It is an arithmetic number, because the mean of its divisors is an integer number (10691164).

Almost surely, 2^21382327 is an apocalyptic number.

21382327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21382327 is an equidigital number, since it uses as much as digits as its factorization.

21382327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 21382327 is about 4624.1028319016. The cubic root of 21382327 is about 277.5566618598.

It can be divided in two parts, 2138 and 2327, that added together give a triangular number (4465 = T₉₄).

The spelling of 21382327 in words is "twenty-one million, three hundred eighty-two thousand, three hundred twenty-seven".