20608309879 has 8 divisors (see below), whose sum is σ = 21505892832. Its totient is φ = 19710857760.

The previous prime is 20608309873. The next prime is 20608309919. The reversal of 20608309879 is 97890380602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20608309879 - 2³ = 20608309871 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 (20608309871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426517 + ... + 472369.

It is an arithmetic number, because the mean of its divisors is an integer number (2688236604).

Almost surely, 2^20608309879 is an apocalyptic number.

20608309879 is a deficient number, since it is larger than the sum of its proper divisors (897582953).

20608309879 is a wasteful number, since it uses less digits than its factorization.

20608309879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65417.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 20608309879 in words is "twenty billion, six hundred eight million, three hundred nine thousand, eight hundred seventy-nine".