21482528 has 24 divisors (see below), whose sum is σ = 42538860. Its totient is φ = 10679040.

The previous prime is 21482519. The next prime is 21482557. The reversal of 21482528 is 82528412.

It can be written as a sum of positive squares in 2 ways, for example, as 17205904 + 4276624 = 4148^2 + 2068^2 .

It is a super-2 number, since 2×21482528² = 922998018541568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 21482494 and 21482503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3938 + ... + 7646.

Almost surely, 2^21482528 is an apocalyptic number.

It is an amenable number.

21482528 is a deficient number, since it is larger than the sum of its proper divisors (21056332).

21482528 is a wasteful number, since it uses less digits than its factorization.

21482528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900 (or 3892 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 21482528 is about 4634.9248106091. The cubic root of 21482528 is about 277.9895446614.

The spelling of 21482528 in words is "twenty-one million, four hundred eighty-two thousand, five hundred twenty-eight".