18659126993 has 8 divisors (see below), whose sum is σ = 20968116288. Its totient is φ = 16474947984.

The previous prime is 18659126971. The next prime is 18659127001. The reversal of 18659126993 is 39962195681.

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

It is a cyclic number.

It is not a de Polignac number, because 18659126993 - 2⁶ = 18659126929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18659126953) 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 7 ways as a sum of consecutive naturals, for example, 31202255 + ... + 31202852.

It is an arithmetic number, because the mean of its divisors is an integer number (2621014536).

Almost surely, 2^18659126993 is an apocalyptic number.

18659126993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18659126993 is a deficient number, since it is larger than the sum of its proper divisors (2308989295).

18659126993 is a wasteful number, since it uses less digits than its factorization.

18659126993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62405143.

The product of its digits is 6298560, while the sum is 59.

The spelling of 18659126993 in words is "eighteen billion, six hundred fifty-nine million, one hundred twenty-six thousand, nine hundred ninety-three".