21149324 has 12 divisors (see below), whose sum is σ = 42298704. Its totient is φ = 9063984.

The previous prime is 21149321. The next prime is 21149333. The reversal of 21149324 is 42394112.

21149324 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21149293 and 21149302.

It is not an unprimeable number, because it can be changed into a prime (21149321) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 377639 + ... + 377694.

It is an arithmetic number, because the mean of its divisors is an integer number (3524892).

Almost surely, 2^21149324 is an apocalyptic number.

It is an amenable number.

21149324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21149324 is a wasteful number, since it uses less digits than its factorization.

21149324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755344 (or 755342 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 21149324 is about 4598.8394188099. The cubic root of 21149324 is about 276.5448001206.

The spelling of 21149324 in words is "twenty-one million, one hundred forty-nine thousand, three hundred twenty-four".