18122653853 has 4 divisors (see below), whose sum is σ = 19076477760. Its totient is φ = 17168829948.

The previous prime is 18122653831. The next prime is 18122653933. The reversal of 18122653853 is 35835622181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35835622181 = 10163 ⋅3526087.

It is a cyclic number.

It is not a de Polignac number, because 18122653853 - 2⁶ = 18122653789 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 (18122653823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476911925 + ... + 476911962.

It is an arithmetic number, because the mean of its divisors is an integer number (4769119440).

Almost surely, 2^18122653853 is an apocalyptic number.

It is an amenable number.

18122653853 is a deficient number, since it is larger than the sum of its proper divisors (953823907).

18122653853 is an equidigital number, since it uses as much as digits as its factorization.

18122653853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953823906.

The product of its digits is 345600, while the sum is 44.

The spelling of 18122653853 in words is "eighteen billion, one hundred twenty-two million, six hundred fifty-three thousand, eight hundred fifty-three".