21300324 has 24 divisors (see below), whose sum is σ = 49788480. Its totient is φ = 7087584.

The previous prime is 21300319. The next prime is 21300341. The reversal of 21300324 is 42300312.

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, 7722 + ... + 10110.

It is an arithmetic number, because the mean of its divisors is an integer number (2074520).

Almost surely, 2^21300324 is an apocalyptic number.

It is an amenable number.

21300324 is an abundant number, since it is smaller than the sum of its proper divisors (28488156).

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

21300324 is a wasteful number, since it uses less digits than its factorization.

21300324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21300324 is about 4615.2274050148. The cubic root of 21300324 is about 277.2013896888.

Adding to 21300324 its reverse (42300312), we get a palindrome (63600636).

The spelling of 21300324 in words is "twenty-one million, three hundred thousand, three hundred twenty-four".