18471280253 has 4 divisors (see below), whose sum is σ = 18774088188. Its totient is φ = 18168472320.

The previous prime is 18471280211. The next prime is 18471280259. The reversal of 18471280253 is 35208217481.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4608101689 + 13863178564 = 67883^2 + 117742^2 .

It is a cyclic number.

It is not a de Polignac number, because 18471280253 - 2¹⁶ = 18471214717 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 18471280253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18471280259) 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, 151403876 + ... + 151403997.

It is an arithmetic number, because the mean of its divisors is an integer number (4693522047).

Almost surely, 2^18471280253 is an apocalyptic number.

It is an amenable number.

18471280253 is a deficient number, since it is larger than the sum of its proper divisors (302807935).

18471280253 is an equidigital number, since it uses as much as digits as its factorization.

18471280253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302807934.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 18471280253 in words is "eighteen billion, four hundred seventy-one million, two hundred eighty thousand, two hundred fifty-three".