21102324 has 12 divisors (see below), whose sum is σ = 49238784. Its totient is φ = 7034104.

The previous prime is 21102313. The next prime is 21102377. The reversal of 21102324 is 42320112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879252 + ... + 879275.

It is an arithmetic number, because the mean of its divisors is an integer number (4103232).

Almost surely, 2^21102324 is an apocalyptic number.

It is an amenable number.

21102324 is an abundant number, since it is smaller than the sum of its proper divisors (28136460).

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

21102324 is a wasteful number, since it uses less digits than its factorization.

21102324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758534 (or 1758532 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21102324 is about 4593.7265917771. The cubic root of 21102324 is about 276.3397936363.

Adding to 21102324 its reverse (42320112), we get a palindrome (63422436).

The spelling of 21102324 in words is "twenty-one million, one hundred two thousand, three hundred twenty-four".