18007896061 has 4 divisors (see below), whose sum is σ = 18193544572. Its totient is φ = 17822247552.

The previous prime is 18007896037. The next prime is 18007896077. The reversal of 18007896061 is 16069870081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16069870081 = 37 ⋅434320813.

It can be written as a sum of positive squares in 2 ways, for example, as 11734305625 + 6273590436 = 108325^2 + 79206^2 .

It is a cyclic number.

It is not a de Polignac number, because 18007896061 - 2⁷ = 18007895933 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 (18007896961) 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, 92824110 + ... + 92824303.

It is an arithmetic number, because the mean of its divisors is an integer number (4548386143).

Almost surely, 2^18007896061 is an apocalyptic number.

It is an amenable number.

18007896061 is a deficient number, since it is larger than the sum of its proper divisors (185648511).

18007896061 is an equidigital number, since it uses as much as digits as its factorization.

18007896061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185648510.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 18007896061 in words is "eighteen billion, seven million, eight hundred ninety-six thousand, sixty-one".