18129805751 has 4 divisors (see below), whose sum is σ = 18130329672. Its totient is φ = 18129281832.

The previous prime is 18129805741. The next prime is 18129805753. The reversal of 18129805751 is 15750892181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15750892181 = 67 ⋅235087943.

It is a cyclic number.

It is not a de Polignac number, because 18129805751 - 2²⁶ = 18062696887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18129805696 and 18129805705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18129805753) 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, 206081 + ... + 280586.

It is an arithmetic number, because the mean of its divisors is an integer number (4532582418).

Almost surely, 2^18129805751 is an apocalyptic number.

18129805751 is a deficient number, since it is larger than the sum of its proper divisors (523921).

18129805751 is an equidigital number, since it uses as much as digits as its factorization.

18129805751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523920.

The product of its (nonzero) digits is 201600, while the sum is 47.

The spelling of 18129805751 in words is "eighteen billion, one hundred twenty-nine million, eight hundred five thousand, seven hundred fifty-one".