21014752 has 48 divisors (see below), whose sum is σ = 45505152. Its totient is φ = 9473920.

The previous prime is 21014743. The next prime is 21014753. The reversal of 21014752 is 25741012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79773 + ... + 80035.

It is an arithmetic number, because the mean of its divisors is an integer number (948024).

Almost surely, 2^21014752 is an apocalyptic number.

21014752 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21014752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22752576).

21014752 is an abundant number, since it is smaller than the sum of its proper divisors (24490400).

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

21014752 is a wasteful number, since it uses less digits than its factorization.

21014752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 21014752 is about 4584.1849875414. The cubic root of 21014752 is about 275.9570051349.

Adding to 21014752 its reverse (25741012), we get a palindrome (46755764).

The spelling of 21014752 in words is "twenty-one million, fourteen thousand, seven hundred fifty-two".