21340132 has 24 divisors (see below), whose sum is σ = 41513472. Its totient is φ = 9516000.

The previous prime is 21340093. The next prime is 21340141. The reversal of 21340132 is 23104312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244 + ... + 6907.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^21340132 is an apocalyptic number.

21340132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21340132 is a deficient number, since it is larger than the sum of its proper divisors (20173340).

21340132 is a wasteful number, since it uses less digits than its factorization.

21340132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9219 (or 9217 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21340132 is about 4619.5380721453. The cubic root of 21340132 is about 277.3739686872.

Adding to 21340132 its reverse (23104312), we get a palindrome (44444444).

The spelling of 21340132 in words is "twenty-one million, three hundred forty thousand, one hundred thirty-two".