21110752 has 48 divisors (see below), whose sum is σ = 46230912. Its totient is φ = 9423360.

The previous prime is 21110737. The next prime is 21110813. The reversal of 21110752 is 25701112.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12078 + ... + 13714.

It is an arithmetic number, because the mean of its divisors is an integer number (963144).

Almost surely, 2^21110752 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 21110752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23115456).

21110752 is an abundant number, since it is smaller than the sum of its proper divisors (25120160).

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

21110752 is a wasteful number, since it uses less digits than its factorization.

21110752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691 (or 1683 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 21110752 is about 4594.6438382099. The cubic root of 21110752 is about 276.3765776069.

Adding to 21110752 its reverse (25701112), we get a palindrome (46811864).

The spelling of 21110752 in words is "twenty-one million, one hundred ten thousand, seven hundred fifty-two".