21048782 has 16 divisors (see below), whose sum is σ = 32965152. Its totient is φ = 10069920.

The previous prime is 21048761. The next prime is 21048793. The reversal of 21048782 is 28784012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2183 + ... + 6845.

It is an arithmetic number, because the mean of its divisors is an integer number (2060322).

Almost surely, 2^21048782 is an apocalyptic number.

21048782 is a deficient number, since it is larger than the sum of its proper divisors (11916370).

21048782 is a wasteful number, since it uses less digits than its factorization.

21048782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 21048782 is about 4587.8951600925. The cubic root of 21048782 is about 276.1058807513.

The spelling of 21048782 in words is "twenty-one million, forty-eight thousand, seven hundred eighty-two".