20709448 has 8 divisors (see below), whose sum is σ = 38830230. Its totient is φ = 10354720.

The previous prime is 20709433. The next prime is 20709461. The reversal of 20709448 is 84490702.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19166884 + 1542564 = 4378^2 + 1242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1294333 + ... + 1294348.

Almost surely, 2^20709448 is an apocalyptic number.

It is an amenable number.

20709448 is a deficient number, since it is larger than the sum of its proper divisors (18120782).

20709448 is a wasteful number, since it uses less digits than its factorization.

20709448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588687 (or 2588683 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20709448 is about 4550.7634524330. The cubic root of 20709448 is about 274.6141055780.

The spelling of 20709448 in words is "twenty million, seven hundred nine thousand, four hundred forty-eight".