18140037829 has 4 divisors (see below), whose sum is σ = 18173568940. Its totient is φ = 18106506720.

The previous prime is 18140037821. The next prime is 18140037857. The reversal of 18140037829 is 92873004181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92873004181 = 17 ⋅5463117893.

It can be written as a sum of positive squares in 2 ways, for example, as 11793525604 + 6346512225 = 108598^2 + 79665^2 .

It is a cyclic number.

It is not a de Polignac number, because 18140037829 - 2³ = 18140037821 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 (18140037821) 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, 16764744 + ... + 16765825.

It is an arithmetic number, because the mean of its divisors is an integer number (4543392235).

Almost surely, 2^18140037829 is an apocalyptic number.

It is an amenable number.

18140037829 is a deficient number, since it is larger than the sum of its proper divisors (33531111).

18140037829 is an equidigital number, since it uses as much as digits as its factorization.

18140037829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33531110.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 18140037829 in words is "eighteen billion, one hundred forty million, thirty-seven thousand, eight hundred twenty-nine".