18740650729 has 4 divisors (see below), whose sum is σ = 18749581200. Its totient is φ = 18731720260.

The previous prime is 18740650661. The next prime is 18740650837. The reversal of 18740650729 is 92705604781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18740650729 - 2¹⁹ = 18740126441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18740650529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4462087 + ... + 4466284.

It is an arithmetic number, because the mean of its divisors is an integer number (4687395300).

Almost surely, 2^18740650729 is an apocalyptic number.

It is an amenable number.

18740650729 is a deficient number, since it is larger than the sum of its proper divisors (8930471).

18740650729 is an equidigital number, since it uses as much as digits as its factorization.

18740650729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930470.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 18740650729 in words is "eighteen billion, seven hundred forty million, six hundred fifty thousand, seven hundred twenty-nine".