18145730429 has 4 divisors (see below), whose sum is σ = 18147922080. Its totient is φ = 18143538780.

The previous prime is 18145730411. The next prime is 18145730467. The reversal of 18145730429 is 92403754181.

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 a de Polignac number, because none of the positive numbers 2^k-18145730429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18145730429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18145730129) 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, 1083359 + ... + 1099980.

It is an arithmetic number, because the mean of its divisors is an integer number (4536980520).

Almost surely, 2^18145730429 is an apocalyptic number.

It is an amenable number.

18145730429 is a deficient number, since it is larger than the sum of its proper divisors (2191651).

18145730429 is an equidigital number, since it uses as much as digits as its factorization.

18145730429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191650.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 18145730429 in words is "eighteen billion, one hundred forty-five million, seven hundred thirty thousand, four hundred twenty-nine".