21327683 has 8 divisors (see below), whose sum is σ = 23007600. Its totient is φ = 19653408.

The previous prime is 21327653. The next prime is 21327689. The reversal of 21327683 is 38672312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21327683 - 2¹⁰ = 21326659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21327689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9788 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (2875950).

Almost surely, 2^21327683 is an apocalyptic number.

21327683 is a deficient number, since it is larger than the sum of its proper divisors (1679917).

21327683 is a wasteful number, since it uses less digits than its factorization.

21327683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its digits is 12096, while the sum is 32.

The square root of 21327683 is about 4618.1904464844. The cubic root of 21327683 is about 277.3200218137.

Adding to 21327683 its reverse (38672312), we get a palindrome (59999995).

The spelling of 21327683 in words is "twenty-one million, three hundred twenty-seven thousand, six hundred eighty-three".