20579679 has 12 divisors (see below), whose sum is σ = 31291000. Its totient is φ = 12997584.

The previous prime is 20579651. The next prime is 20579683. The reversal of 20579679 is 97697502.

20579679 is a `hidden beast` number, since 2 + 0 + 579 + 6 + 79 = 666.

It is not a de Polignac number, because 20579679 - 2⁷ = 20579551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20579609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60004 + ... + 60345.

Almost surely, 2^20579679 is an apocalyptic number.

20579679 is a deficient number, since it is larger than the sum of its proper divisors (10711321).

20579679 is a wasteful number, since it uses less digits than its factorization.

20579679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120374 (or 120371 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 20579679 is about 4536.4831091937. The cubic root of 20579679 is about 274.0393100756.

The spelling of 20579679 in words is "twenty million, five hundred seventy-nine thousand, six hundred seventy-nine".