21110324 has 12 divisors (see below), whose sum is σ = 37640484. Its totient is φ = 10355904.

The previous prime is 21110263. The next prime is 21110363. The reversal of 21110324 is 42301112.

It can be written as a sum of positive squares in 2 ways, for example, as 16564900 + 4545424 = 4070^2 + 2132^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21110299 and 21110308.

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, 49577 + ... + 50000.

It is an arithmetic number, because the mean of its divisors is an integer number (3136707).

Almost surely, 2^21110324 is an apocalyptic number.

It is an amenable number.

21110324 is a deficient number, since it is larger than the sum of its proper divisors (16530160).

21110324 is a wasteful number, since it uses less digits than its factorization.

21110324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99634 (or 99632 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21110324 is about 4594.5972620024. The cubic root of 21110324 is about 276.3747098387.

Adding to 21110324 its reverse (42301112), we get a palindrome (63411436).

The spelling of 21110324 in words is "twenty-one million, one hundred ten thousand, three hundred twenty-four".