20789079 has 32 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 12114432.

The previous prime is 20789071. The next prime is 20789089. The reversal of 20789079 is 97098702.

It is not a de Polignac number, because 20789079 - 2³ = 20789071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20789079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20789071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43162 + ... + 43640.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^20789079 is an apocalyptic number.

20789079 is a deficient number, since it is larger than the sum of its proper divisors (10729641).

20789079 is a wasteful number, since it uses less digits than its factorization.

20789079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 20789079 is about 4559.5042493675. The cubic root of 20789079 is about 274.9656331709.

The spelling of 20789079 in words is "twenty million, seven hundred eighty-nine thousand, seventy-nine".