18405754253 has 4 divisors (see below), whose sum is σ = 18568637148. Its totient is φ = 18242871360.

The previous prime is 18405754201. The next prime is 18405754261. The reversal of 18405754253 is 35245750481.

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 5924842729 + 12480911524 = 76973^2 + 111718^2 .

It is a cyclic number.

It is not a de Polignac number, because 18405754253 - 2²⁰ = 18404705677 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 (18405754453) 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, 81441278 + ... + 81441503.

It is an arithmetic number, because the mean of its divisors is an integer number (4642159287).

Almost surely, 2^18405754253 is an apocalyptic number.

It is an amenable number.

18405754253 is a deficient number, since it is larger than the sum of its proper divisors (162882895).

18405754253 is a wasteful number, since it uses less digits than its factorization.

18405754253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162882894.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 18405754253 in words is "eighteen billion, four hundred five million, seven hundred fifty-four thousand, two hundred fifty-three".