18352213557 has 8 divisors (see below), whose sum is σ = 24472358400. Its totient is φ = 12233438880.

The previous prime is 18352213549. The next prime is 18352213573. The reversal of 18352213557 is 75531225381.

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

It is not a de Polignac number, because 18352213557 - 2³ = 18352213549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18352213577) 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, 310869 + ... + 365162.

It is an arithmetic number, because the mean of its divisors is an integer number (3059044800).

Almost surely, 2^18352213557 is an apocalyptic number.

It is an amenable number.

18352213557 is a deficient number, since it is larger than the sum of its proper divisors (6120144843).

18352213557 is an equidigital number, since it uses as much as digits as its factorization.

18352213557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685083.

The product of its digits is 252000, while the sum is 42.

The spelling of 18352213557 in words is "eighteen billion, three hundred fifty-two million, two hundred thirteen thousand, five hundred fifty-seven".