18061304831 has 4 divisors (see below), whose sum is σ = 18079679472. Its totient is φ = 18042930192.

The previous prime is 18061304819. The next prime is 18061304881. The reversal of 18061304831 is 13840316081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13840316081 = 54601 ⋅253481.

It is a cyclic number.

It is not a de Polignac number, because 18061304831 - 2³⁰ = 16987563007 is a prime.

It is a super-2 number, since 2×18061304831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18061304791 and 18061304800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18061304881) 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, 9185846 + ... + 9187811.

It is an arithmetic number, because the mean of its divisors is an integer number (4519919868).

Almost surely, 2^18061304831 is an apocalyptic number.

18061304831 is a deficient number, since it is larger than the sum of its proper divisors (18374641).

18061304831 is an equidigital number, since it uses as much as digits as its factorization.

18061304831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18374640.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 18061304831 in words is "eighteen billion, sixty-one million, three hundred four thousand, eight hundred thirty-one".