20652479779 has 8 divisors (see below), whose sum is σ = 21178816848. Its totient is φ = 20127219840.

The previous prime is 20652479671. The next prime is 20652479797. The reversal of 20652479779 is 97797425602.

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 20652479779 - 2¹¹ = 20652477731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20652479179) 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, 230377 + ... + 307210.

It is an arithmetic number, because the mean of its divisors is an integer number (2647352106).

Almost surely, 2^20652479779 is an apocalyptic number.

20652479779 is a deficient number, since it is larger than the sum of its proper divisors (526337069).

20652479779 is an equidigital number, since it uses as much as digits as its factorization.

20652479779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538565.

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 20652479779 in words is "twenty billion, six hundred fifty-two million, four hundred seventy-nine thousand, seven hundred seventy-nine".