18497121123 has 32 divisors (see below), whose sum is σ = 26913277440. Its totient is φ = 11231769600.

The previous prime is 18497121089. The next prime is 18497121161. The reversal of 18497121123 is 32112179481.

It is not a de Polignac number, because 18497121123 - 2⁹ = 18497120611 is a prime.

It is a super-2 number, since 2×18497121123² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18497121193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3004098 + ... + 3010248.

It is an arithmetic number, because the mean of its divisors is an integer number (841039920).

Almost surely, 2^18497121123 is an apocalyptic number.

18497121123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18497121123 is a deficient number, since it is larger than the sum of its proper divisors (8416156317).

18497121123 is a wasteful number, since it uses less digits than its factorization.

18497121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7179.

The product of its digits is 24192, while the sum is 39.

The spelling of 18497121123 in words is "eighteen billion, four hundred ninety-seven million, one hundred twenty-one thousand, one hundred twenty-three".