18481223057 has 4 divisors (see below), whose sum is σ = 20161334256. Its totient is φ = 16801111860.

The previous prime is 18481223029. The next prime is 18481223063. The reversal of 18481223057 is 75032218481.

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.

It is a cyclic number.

It is not a de Polignac number, because 18481223057 - 2²² = 18477028753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18481225057) 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, 840055583 + ... + 840055604.

It is an arithmetic number, because the mean of its divisors is an integer number (5040333564).

Almost surely, 2^18481223057 is an apocalyptic number.

It is an amenable number.

18481223057 is a deficient number, since it is larger than the sum of its proper divisors (1680111199).

18481223057 is a wasteful number, since it uses less digits than its factorization.

18481223057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680111198.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 18481223057 in words is "eighteen billion, four hundred eighty-one million, two hundred twenty-three thousand, fifty-seven".