18139799123520 has 224 divisors, whose sum is σ = 58817655653760. Its totient is φ = 4735570329600.

The previous prime is 18139799123497. The next prime is 18139799123531. The reversal of 18139799123520 is 2532199793181.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

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, 7578399 + ... + 9680481.

Almost surely, 2^{18139799123520} is an apocalyptic number.

18139799123520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18139799123520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29408827826880).

18139799123520 is an abundant number, since it is smaller than the sum of its proper divisors (40677856530240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18139799123520 is a wasteful number, since it uses less digits than its factorization.

18139799123520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102293 (or 2102283 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 60.

The spelling of 18139799123520 in words is "eighteen trillion, one hundred thirty-nine billion, seven hundred ninety-nine million, one hundred twenty-three thousand, five hundred twenty".