21246324 has 48 divisors (see below), whose sum is σ = 54867456. Its totient is φ = 6344800.

The previous prime is 21246317. The next prime is 21246341. The reversal of 21246324 is 42364212.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21246294 and 21246303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8239 + ... + 10505.

It is an arithmetic number, because the mean of its divisors is an integer number (1143072).

Almost surely, 2^21246324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21246324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27433728).

21246324 is an abundant number, since it is smaller than the sum of its proper divisors (33621132).

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

21246324 is a wasteful number, since it uses less digits than its factorization.

21246324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356 (or 2354 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 21246324 is about 4609.3734932201. The cubic root of 21246324 is about 276.9669403216.

It can be divided in two parts, 2124 and 6324, that added together give a palindrome (8448).

The spelling of 21246324 in words is "twenty-one million, two hundred forty-six thousand, three hundred twenty-four".