20779608 has 16 divisors (see below), whose sum is σ = 51949080. Its totient is φ = 6926528.

The previous prime is 20779571. The next prime is 20779609. The reversal of 20779608 is 80697702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20779609) by changing a digit.

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, 432885 + ... + 432932.

Almost surely, 2^20779608 is an apocalyptic number.

It is an amenable number.

20779608 is an abundant number, since it is smaller than the sum of its proper divisors (31169472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20779608 is a wasteful number, since it uses less digits than its factorization.

20779608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865826 (or 865822 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 20779608 is about 4558.4655312945. The cubic root of 20779608 is about 274.9238709379.

The spelling of 20779608 in words is "twenty million, seven hundred seventy-nine thousand, six hundred eight".