21348327 has 32 divisors (see below), whose sum is σ = 38223360. Its totient is φ = 10235520.

The previous prime is 21348323. The next prime is 21348329. The reversal of 21348327 is 72384312.

It is not a de Polignac number, because 21348327 - 2² = 21348323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21348294 and 21348303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21348323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 552 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (1194480).

Almost surely, 2^21348327 is an apocalyptic number.

21348327 is a deficient number, since it is larger than the sum of its proper divisors (16875033).

21348327 is a wasteful number, since it uses less digits than its factorization.

21348327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143.

The product of its digits is 8064, while the sum is 30.

The square root of 21348327 is about 4620.4249804536. The cubic root of 21348327 is about 277.4094696980.

The spelling of 21348327 in words is "twenty-one million, three hundred forty-eight thousand, three hundred twenty-seven".