21048712 has 16 divisors (see below), whose sum is σ = 39617100. Its totient is φ = 10484160.

The previous prime is 21048707. The next prime is 21048757. The reversal of 21048712 is 21784012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19236996 + 1811716 = 4386^2 + 1346^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739 + ... + 7042.

Almost surely, 2^21048712 is an apocalyptic number.

It is an amenable number.

21048712 is a deficient number, since it is larger than the sum of its proper divisors (18568388).

21048712 is a wasteful number, since it uses less digits than its factorization.

21048712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10056 (or 10052 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 21048712 is about 4587.8875313155. The cubic root of 21048712 is about 276.1055746776.

It can be divided in two parts, 2104 and 8712, that added together give a square (10816 = 104²).

The spelling of 21048712 in words is "twenty-one million, forty-eight thousand, seven hundred twelve".