21325532 has 24 divisors (see below), whose sum is σ = 38019072. Its totient is φ = 10465200.

The previous prime is 21325511. The next prime is 21325553. The reversal of 21325532 is 23552312.

It is an interprime number because it is at equal distance from previous prime (21325511) and next prime (21325553).

It is a junction number, because it is equal to n+sod(n) for n = 21325498 and 21325507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78557 + ... + 78827.

It is an arithmetic number, because the mean of its divisors is an integer number (1584128).

Almost surely, 2^21325532 is an apocalyptic number.

It is an amenable number.

21325532 is a deficient number, since it is larger than the sum of its proper divisors (16693540).

21325532 is a wasteful number, since it uses less digits than its factorization.

21325532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 567 counting only the distinct ones).

The product of its digits is 1800, while the sum is 23.

The square root of 21325532 is about 4617.9575571891. The cubic root of 21325532 is about 277.3106984783.

Adding to 21325532 its reverse (23552312), we get a palindrome (44877844).

The spelling of 21325532 in words is "twenty-one million, three hundred twenty-five thousand, five hundred thirty-two".