21119528 has 8 divisors (see below), whose sum is σ = 39599130. Its totient is φ = 10559760.

The previous prime is 21119503. The next prime is 21119531. The reversal of 21119528 is 82591112.

It can be written as a sum of positive squares in only one way, i.e., 18679684 + 2439844 = 4322^2 + 1562^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21119528.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319963 + ... + 1319978.

Almost surely, 2^21119528 is an apocalyptic number.

It is an amenable number.

21119528 is a deficient number, since it is larger than the sum of its proper divisors (18479602).

21119528 is a wasteful number, since it uses less digits than its factorization.

21119528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639947 (or 2639943 counting only the distinct ones).

The product of its digits is 1440, while the sum is 29.

The square root of 21119528 is about 4595.5987640350. The cubic root of 21119528 is about 276.4148700186.

The spelling of 21119528 in words is "twenty-one million, one hundred nineteen thousand, five hundred twenty-eight".