20778479113 has 8 divisors (see below), whose sum is σ = 23750152128. Its totient is φ = 17807635824.

The previous prime is 20778479063. The next prime is 20778479119. The reversal of 20778479113 is 31197487702.

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 20778479113 - 2³³ = 12188544521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20778479119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152806 + ... + 254767.

It is an arithmetic number, because the mean of its divisors is an integer number (2968769016).

Almost surely, 2^20778479113 is an apocalyptic number.

It is an amenable number.

20778479113 is a deficient number, since it is larger than the sum of its proper divisors (2971673015).

20778479113 is an equidigital number, since it uses as much as digits as its factorization.

20778479113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414863.

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 20778479113 in words is "twenty billion, seven hundred seventy-eight million, four hundred seventy-nine thousand, one hundred thirteen".