18430389253 has 4 divisors (see below), whose sum is σ = 19400409760. Its totient is φ = 17460368748.

The previous prime is 18430389247. The next prime is 18430389259. The reversal of 18430389253 is 35298303481.

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 an interprime number because it is at equal distance from previous prime (18430389247) and next prime (18430389259).

It is a cyclic number.

It is not a de Polignac number, because 18430389253 - 2¹³ = 18430381061 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 (18430389259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485010225 + ... + 485010262.

It is an arithmetic number, because the mean of its divisors is an integer number (4850102440).

Almost surely, 2^18430389253 is an apocalyptic number.

It is an amenable number.

18430389253 is a deficient number, since it is larger than the sum of its proper divisors (970020507).

18430389253 is an equidigital number, since it uses as much as digits as its factorization.

18430389253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970020506.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 18430389253 in words is "eighteen billion, four hundred thirty million, three hundred eighty-nine thousand, two hundred fifty-three".