21048339 has 16 divisors (see below), whose sum is σ = 30868992. Its totient is φ = 12676128.

The previous prime is 21048323. The next prime is 21048341. The reversal of 21048339 is 93384012.

It is not a de Polignac number, because 21048339 - 2⁴ = 21048323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21048239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3909 + ... + 7574.

It is an arithmetic number, because the mean of its divisors is an integer number (1929312).

Almost surely, 2^21048339 is an apocalyptic number.

21048339 is a deficient number, since it is larger than the sum of its proper divisors (9820653).

21048339 is a wasteful number, since it uses less digits than its factorization.

21048339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11546.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 21048339 is about 4587.8468806184. The cubic root of 21048339 is about 276.1039437308.

The spelling of 21048339 in words is "twenty-one million, forty-eight thousand, three hundred thirty-nine".