21376752 has 120 divisors (see below), whose sum is σ = 62126976. Its totient is φ = 6319104.

The previous prime is 21376739. The next prime is 21376757. The reversal of 21376752 is 25767312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21376757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319023 + ... + 319089.

Almost surely, 2^21376752 is an apocalyptic number.

It is a pronic number, being equal to 4623×4624.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21376752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31063488).

21376752 is an abundant number, since it is smaller than the sum of its proper divisors (40750224).

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

21376752 is a wasteful number, since it uses less digits than its factorization.

21376752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 112 counting only the distinct ones).

The product of its digits is 17640, while the sum is 33.

The square root of 21376752 is about 4623.4999729642. The cubic root of 21376752 is about 277.5325373746.

The spelling of 21376752 in words is "twenty-one million, three hundred seventy-six thousand, seven hundred fifty-two".