18390389253 has 32 divisors (see below), whose sum is σ = 25931304960. Its totient is φ = 11574904320.

The previous prime is 18390389231. The next prime is 18390389323. The reversal of 18390389253 is 35298309381.

It is not a de Polignac number, because 18390389253 - 2⁵ = 18390389221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18390389196 and 18390389205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18390389053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4072725 + ... + 4077237.

It is an arithmetic number, because the mean of its divisors is an integer number (810353280).

Almost surely, 2^18390389253 is an apocalyptic number.

It is an amenable number.

18390389253 is a deficient number, since it is larger than the sum of its proper divisors (7540915707).

18390389253 is a wasteful number, since it uses less digits than its factorization.

18390389253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5609.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 18390389253 in words is "eighteen billion, three hundred ninety million, three hundred eighty-nine thousand, two hundred fifty-three".