20135494370779 has 4 divisors (see below), whose sum is σ = 20199013280784. Its totient is φ = 20071975460776.

The previous prime is 20135494370773. The next prime is 20135494370819. The reversal of 20135494370779 is 97707349453102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20135494370779 - 2²⁵ = 20135460816347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20135494370773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31759454527 + ... + 31759455160.

It is an arithmetic number, because the mean of its divisors is an integer number (5049753320196).

Almost surely, 2^{20135494370779} is an apocalyptic number.

20135494370779 is a deficient number, since it is larger than the sum of its proper divisors (63518910005).

20135494370779 is an equidigital number, since it uses as much as digits as its factorization.

20135494370779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63518910004.

The product of its (nonzero) digits is 40007520, while the sum is 61.

The spelling of 20135494370779 in words is "twenty trillion, one hundred thirty-five billion, four hundred ninety-four million, three hundred seventy thousand, seven hundred seventy-nine".