19479161101 has 4 divisors (see below), whose sum is σ = 19486397052. Its totient is φ = 19471925152.

The previous prime is 19479161099. The next prime is 19479161113. The reversal of 19479161101 is 10116197491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10116197491 = 37 ⋅273410743.

It can be written as a sum of positive squares in 2 ways, for example, as 6544648201 + 12934512900 = 80899^2 + 113730^2 .

It is a cyclic number.

It is not a de Polignac number, because 19479161101 - 2¹ = 19479161099 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 (19479161161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3613936 + ... + 3619321.

It is an arithmetic number, because the mean of its divisors is an integer number (4871599263).

Almost surely, 2^19479161101 is an apocalyptic number.

It is an amenable number.

19479161101 is a deficient number, since it is larger than the sum of its proper divisors (7235951).

19479161101 is an equidigital number, since it uses as much as digits as its factorization.

19479161101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7235950.

The product of its (nonzero) digits is 13608, while the sum is 40.

The spelling of 19479161101 in words is "nineteen billion, four hundred seventy-nine million, one hundred sixty-one thousand, one hundred one".