21467232 has 72 divisors (see below), whose sum is σ = 61621560. Its totient is φ = 7088640.

The previous prime is 21467227. The next prime is 21467233. The reversal of 21467232 is 23276412.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 21467196 and 21467205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21467233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37444 + ... + 38012.

It is an arithmetic number, because the mean of its divisors is an integer number (855855).

Almost surely, 2^21467232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21467232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30810780).

21467232 is an abundant number, since it is smaller than the sum of its proper divisors (40154328).

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

21467232 is a wasteful number, since it uses less digits than its factorization.

21467232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 705 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 21467232 is about 4633.2744360765. The cubic root of 21467232 is about 277.9235509125.

The spelling of 21467232 in words is "twenty-one million, four hundred sixty-seven thousand, two hundred thirty-two".