18531112983 has 8 divisors (see below), whose sum is σ = 24708888048. Its totient is φ = 12353706624.

The previous prime is 18531112979. The next prime is 18531112987. The reversal of 18531112983 is 38921113581.

It is an interprime number because it is at equal distance from previous prime (18531112979) and next prime (18531112987).

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

It is not a de Polignac number, because 18531112983 - 2² = 18531112979 is a prime.

It is a super-2 number, since 2×18531112983² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18531112987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61885 + ... + 202217.

It is an arithmetic number, because the mean of its divisors is an integer number (3088611006).

Almost surely, 2^18531112983 is an apocalyptic number.

18531112983 is a deficient number, since it is larger than the sum of its proper divisors (6177775065).

18531112983 is a wasteful number, since it uses less digits than its factorization.

18531112983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184353.

The product of its digits is 51840, while the sum is 42.

The spelling of 18531112983 in words is "eighteen billion, five hundred thirty-one million, one hundred twelve thousand, nine hundred eighty-three".