18713692061 has 4 divisors (see below), whose sum is σ = 18744022812. Its totient is φ = 18683361312.

The previous prime is 18713692051. The next prime is 18713692091. The reversal of 18713692061 is 16029631781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16029631781 = 73 ⋅219583997.

It can be written as a sum of positive squares in 2 ways, for example, as 5742759961 + 12970932100 = 75781^2 + 113890^2 .

It is a cyclic number.

It is not a de Polignac number, because 18713692061 - 2¹⁰ = 18713691037 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 (18713692051) 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 3 ways as a sum of consecutive naturals, for example, 15164450 + ... + 15165683.

It is an arithmetic number, because the mean of its divisors is an integer number (4686005703).

Almost surely, 2^18713692061 is an apocalyptic number.

It is an amenable number.

18713692061 is a deficient number, since it is larger than the sum of its proper divisors (30330751).

18713692061 is an equidigital number, since it uses as much as digits as its factorization.

18713692061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30330750.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 18713692061 in words is "eighteen billion, seven hundred thirteen million, six hundred ninety-two thousand, sixty-one".