21360752 has 40 divisors (see below), whose sum is σ = 47541600. Its totient is φ = 9107712.

The previous prime is 21360751. The next prime is 21360761. The reversal of 21360752 is 25706312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21360751) 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 7 ways as a sum of consecutive naturals, for example, 29774 + ... + 30482.

It is an arithmetic number, because the mean of its divisors is an integer number (1188540).

Almost surely, 2^21360752 is an apocalyptic number.

It is an amenable number.

21360752 is an abundant number, since it is smaller than the sum of its proper divisors (26180848).

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

21360752 is a wasteful number, since it uses less digits than its factorization.

21360752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 21360752 is about 4621.7693581571. The cubic root of 21360752 is about 277.4632778829.

The spelling of 21360752 in words is "twenty-one million, three hundred sixty thousand, seven hundred fifty-two".