21134752 has 24 divisors (see below), whose sum is σ = 41713056. Its totient is φ = 10540992.

The previous prime is 21134749. The next prime is 21134753. The reversal of 21134752 is 25743112.

It is a happy number.

It is a pancake number, because a pancake can be divided into 21134752 parts by 6501 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (21134753) 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, 21373 + ... + 22339.

It is an arithmetic number, because the mean of its divisors is an integer number (1738044).

Almost surely, 2^21134752 is an apocalyptic number.

It is an amenable number.

21134752 is a deficient number, since it is larger than the sum of its proper divisors (20578304).

21134752 is an equidigital number, since it uses as much as digits as its factorization.

21134752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 1652 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 21134752 is about 4597.2548330498. The cubic root of 21134752 is about 276.4812719009.

Adding to 21134752 its reverse (25743112), we get a palindrome (46877864).

The spelling of 21134752 in words is "twenty-one million, one hundred thirty-four thousand, seven hundred fifty-two".