19955327713 has 4 divisors (see below), whose sum is σ = 19999772100. Its totient is φ = 19910883328.

The previous prime is 19955327699. The next prime is 19955327723. The reversal of 19955327713 is 31772355991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31772355991 = 1429 ⋅22233979.

It can be written as a sum of positive squares in 2 ways, for example, as 16571927824 + 3383399889 = 128732^2 + 58167^2 .

It is a cyclic number.

It is not a de Polignac number, because 19955327713 - 2²⁵ = 19921773281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19955327723) 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, 22221520 + ... + 22222417.

It is an arithmetic number, because the mean of its divisors is an integer number (4999943025).

Almost surely, 2^19955327713 is an apocalyptic number.

It is an amenable number.

19955327713 is a deficient number, since it is larger than the sum of its proper divisors (44444387).

19955327713 is an equidigital number, since it uses as much as digits as its factorization.

19955327713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44444386.

The product of its digits is 1786050, while the sum is 52.

The spelling of 19955327713 in words is "nineteen billion, nine hundred fifty-five million, three hundred twenty-seven thousand, seven hundred thirteen".