21327024 has 40 divisors (see below), whose sum is σ = 55260352. Its totient is φ = 7087680.

The previous prime is 21327013. The next prime is 21327043. The reversal of 21327024 is 42072312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30519 + ... + 31209.

Almost surely, 2^21327024 is an apocalyptic number.

21327024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21327024 is an abundant number, since it is smaller than the sum of its proper divisors (33933328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21327024 is a wasteful number, since it uses less digits than its factorization.

21327024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 21327024 is about 4618.1190976414. The cubic root of 21327024 is about 277.3171654981.

Adding to 21327024 its reverse (42072312), we get a palindrome (63399336).

The spelling of 21327024 in words is "twenty-one million, three hundred twenty-seven thousand, twenty-four".