18353518523 has 8 divisors (see below), whose sum is σ = 18390415680. Its totient is φ = 18316656000.

The previous prime is 18353518493. The next prime is 18353518537. The reversal of 18353518523 is 32581535381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18353518523 - 2⁶ = 18353518459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18353518583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221923 + ... + 1236851.

It is an arithmetic number, because the mean of its divisors is an integer number (2298801960).

Almost surely, 2^18353518523 is an apocalyptic number.

18353518523 is a deficient number, since it is larger than the sum of its proper divisors (36897157).

18353518523 is a wasteful number, since it uses less digits than its factorization.

18353518523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17317.

The product of its digits is 432000, while the sum is 44.

The spelling of 18353518523 in words is "eighteen billion, three hundred fifty-three million, five hundred eighteen thousand, five hundred twenty-three".