20676579 has 48 divisors (see below), whose sum is σ = 36881280. Its totient is φ = 10160640.

The previous prime is 20676553. The next prime is 20676583. The reversal of 20676579 is 97567602.

It is a happy number.

It is not a de Polignac number, because 20676579 - 2⁵ = 20676547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20676579.

It is not an unprimeable number, because it can be changed into a prime (20676589) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30387 + ... + 31059.

It is an arithmetic number, because the mean of its divisors is an integer number (768360).

Almost surely, 2^20676579 is an apocalyptic number.

20676579 is a deficient number, since it is larger than the sum of its proper divisors (16204701).

20676579 is a wasteful number, since it uses less digits than its factorization.

20676579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 20676579 is about 4547.1506462839. The cubic root of 20676579 is about 274.4687440565.

It can be divided in two parts, 2067 and 6579, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 20676579 in words is "twenty million, six hundred seventy-six thousand, five hundred seventy-nine".