21336752 has 10 divisors (see below), whose sum is σ = 41339988. Its totient is φ = 10668368.

The previous prime is 21336739. The next prime is 21336761. The reversal of 21336752 is 25763312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666758 + ... + 666789.

Almost surely, 2^21336752 is an apocalyptic number.

It is an amenable number.

21336752 is a deficient number, since it is larger than the sum of its proper divisors (20003236).

21336752 is a wasteful number, since it uses less digits than its factorization.

21336752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333555 (or 1333549 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 21336752 is about 4619.1722202144. The cubic root of 21336752 is about 277.3593237682.

Adding to 21336752 its product of digits (7560), we get a palindrome (21344312).

The spelling of 21336752 in words is "twenty-one million, three hundred thirty-six thousand, seven hundred fifty-two".