20679748 has 12 divisors (see below), whose sum is σ = 36223740. Its totient is φ = 10330112.

The previous prime is 20679727. The next prime is 20679767. The reversal of 20679748 is 84797602.

It can be written as a sum of positive squares in 2 ways, for example, as 4743684 + 15936064 = 2178^2 + 3992^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4548 + ... + 7876.

It is an arithmetic number, because the mean of its divisors is an integer number (3018645).

Almost surely, 2^20679748 is an apocalyptic number.

It is an amenable number.

20679748 is a deficient number, since it is larger than the sum of its proper divisors (15543992).

20679748 is a wasteful number, since it uses less digits than its factorization.

20679748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886 (or 4884 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 20679748 is about 4547.4990929081. The cubic root of 20679748 is about 274.4827655091.

The spelling of 20679748 in words is "twenty million, six hundred seventy-nine thousand, seven hundred forty-eight".