21470327 has 2 divisors, whose sum is σ = 21470328. Its totient is φ = 21470326.

The previous prime is 21470311. The next prime is 21470333. The reversal of 21470327 is 72307412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21470327 - 2⁴ = 21470311 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21470296 and 21470305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21470377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10735163 + 10735164.

It is an arithmetic number, because the mean of its divisors is an integer number (10735164).

Almost surely, 2^21470327 is an apocalyptic number.

21470327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21470327 is an equidigital number, since it uses as much as digits as its factorization.

21470327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 21470327 is about 4633.6084210904. The cubic root of 21470327 is about 277.9369066486.

Adding to 21470327 its reverse (72307412), we get a palindrome (93777739).

The spelling of 21470327 in words is "twenty-one million, four hundred seventy thousand, three hundred twenty-seven".