18701123620830 has 128 divisors (see below), whose sum is σ = 51464644558848. Its totient is φ = 4260380454912.

The previous prime is 18701123620813. The next prime is 18701123620871. The reversal of 18701123620830 is 3802632110781.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115175062 + ... + 115337318.

It is an arithmetic number, because the mean of its divisors is an integer number (402067535616).

Almost surely, 2^{18701123620830} is an apocalyptic number.

18701123620830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18701123620830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25732322279424).

18701123620830 is an abundant number, since it is smaller than the sum of its proper divisors (32763520938018).

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

18701123620830 is a wasteful number, since it uses less digits than its factorization.

18701123620830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164090.

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 18701123620830 in words is "eighteen trillion, seven hundred one billion, one hundred twenty-three million, six hundred twenty thousand, eight hundred thirty".