21327463 has 8 divisors (see below), whose sum is σ = 22477536. Its totient is φ = 20196000.

The previous prime is 21327451. The next prime is 21327511. The reversal of 21327463 is 36472312.

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 21327463 - 2⁹ = 21326951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2268 + ... + 6913.

It is an arithmetic number, because the mean of its divisors is an integer number (2809692).

Almost surely, 2^21327463 is an apocalyptic number.

21327463 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21327463 is a deficient number, since it is larger than the sum of its proper divisors (1150073).

21327463 is a wasteful number, since it uses less digits than its factorization.

21327463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9305.

The product of its digits is 6048, while the sum is 28.

The square root of 21327463 is about 4618.1666275699. The cubic root of 21327463 is about 277.3190682703.

Adding to 21327463 its reverse (36472312), we get a palindrome (57799775).

The spelling of 21327463 in words is "twenty-one million, three hundred twenty-seven thousand, four hundred sixty-three".