21327411 has 24 divisors (see below), whose sum is σ = 33733632. Its totient is φ = 11728800.

The previous prime is 21327407. The next prime is 21327451. The reversal of 21327411 is 11472312.

It is not a de Polignac number, because 21327411 - 2² = 21327407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327451) 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 23 ways as a sum of consecutive naturals, for example, 117741 + ... + 117921.

It is an arithmetic number, because the mean of its divisors is an integer number (1405568).

Almost surely, 2^21327411 is an apocalyptic number.

21327411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21327411 is a deficient number, since it is larger than the sum of its proper divisors (12406221).

21327411 is an equidigital number, since it uses as much as digits as its factorization.

21327411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 222 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 21327411 is about 4618.1609976267. The cubic root of 21327411 is about 277.3188428863.

Adding to 21327411 its reverse (11472312), we get a palindrome (32799723).

The spelling of 21327411 in words is "twenty-one million, three hundred twenty-seven thousand, four hundred eleven".