21325032 has 40 divisors (see below), whose sum is σ = 59731650. Its totient is φ = 7108128.

The previous prime is 21325013. The next prime is 21325037. The reversal of 21325032 is 23052312.

It can be written as a sum of positive squares in only one way, i.e., 14699556 + 6625476 = 3834^2 + 2574^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21324996 and 21325014.

It is not an unprimeable number, because it can be changed into a prime (21325037) 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 9 ways as a sum of consecutive naturals, for example, 15807 + ... + 17102.

Almost surely, 2^21325032 is an apocalyptic number.

It is an amenable number.

21325032 is an abundant number, since it is smaller than the sum of its proper divisors (38406618).

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

21325032 is a wasteful number, since it uses less digits than its factorization.

21325032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32927 (or 32914 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 21325032 is about 4617.9034203846. The cubic root of 21325032 is about 277.3085311790.

Adding to 21325032 its reverse (23052312), we get a palindrome (44377344).

The spelling of 21325032 in words is "twenty-one million, three hundred twenty-five thousand, thirty-two".