21413528 has 32 divisors (see below), whose sum is σ = 41842560. Its totient is φ = 10264320.

The previous prime is 21413479. The next prime is 21413531. The reversal of 21413528 is 82531412.

It is a junction number, because it is equal to n+sod(n) for n = 21413497 and 21413506.

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, 21113 + ... + 22103.

It is an arithmetic number, because the mean of its divisors is an integer number (1307580).

Almost surely, 2^21413528 is an apocalyptic number.

It is an amenable number.

21413528 is a deficient number, since it is larger than the sum of its proper divisors (20429032).

21413528 is a wasteful number, since it uses less digits than its factorization.

21413528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1103 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 21413528 is about 4627.4753375896. The cubic root of 21413528 is about 277.6915994118.

The spelling of 21413528 in words is "twenty-one million, four hundred thirteen thousand, five hundred twenty-eight".