18853180505 has 8 divisors (see below), whose sum is σ = 22624674624. Its totient is φ = 15081972400.

The previous prime is 18853180501. The next prime is 18853180561. The reversal of 18853180505 is 50508135881.

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

It is not a de Polignac number, because 18853180505 - 2² = 18853180501 is a prime.

It is a super-2 number, since 2×18853180505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18853180501) 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, 120290 + ... + 228420.

It is an arithmetic number, because the mean of its divisors is an integer number (2828084328).

Almost surely, 2^18853180505 is an apocalyptic number.

It is an amenable number.

18853180505 is a deficient number, since it is larger than the sum of its proper divisors (3771494119).

18853180505 is a wasteful number, since it uses less digits than its factorization.

18853180505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143007.

The product of its (nonzero) digits is 192000, while the sum is 44.

The spelling of 18853180505 in words is "eighteen billion, eight hundred fifty-three million, one hundred eighty thousand, five hundred five".