21048833 has 8 divisors (see below), whose sum is σ = 22814568. Its totient is φ = 19304064.

The previous prime is 21048829. The next prime is 21048857. The reversal of 21048833 is 33884012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 21003889 = 212^2 + 4583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21048833 - 2² = 21048829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21048796 and 21048805.

It is not an unprimeable number, because it can be changed into a prime (21048803) 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, 3116 + ... + 7197.

It is an arithmetic number, because the mean of its divisors is an integer number (2851821).

Almost surely, 2^21048833 is an apocalyptic number.

It is an amenable number.

21048833 is a deficient number, since it is larger than the sum of its proper divisors (1765735).

21048833 is a wasteful number, since it uses less digits than its factorization.

21048833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10483.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 21048833 is about 4587.9007181935. The cubic root of 21048833 is about 276.1061037474.

The spelling of 21048833 in words is "twenty-one million, forty-eight thousand, eight hundred thirty-three".