21041828 has 24 divisors (see below), whose sum is σ = 37914240. Its totient is φ = 10213920.

The previous prime is 21041827. The next prime is 21041857. The reversal of 21041828 is 82814012.

It is a junction number, because it is equal to n+sod(n) for n = 21041797 and 21041806.

It is not an unprimeable number, because it can be changed into a prime (21041821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19733 + ... + 20771.

It is an arithmetic number, because the mean of its divisors is an integer number (1579760).

Almost surely, 2^21041828 is an apocalyptic number.

It is an amenable number.

21041828 is a deficient number, since it is larger than the sum of its proper divisors (16872412).

21041828 is a wasteful number, since it uses less digits than its factorization.

21041828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1185 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 21041828 is about 4587.1372336131. The cubic root of 21041828 is about 276.0754712042.

The spelling of 21041828 in words is "twenty-one million, forty-one thousand, eight hundred twenty-eight".