18139963900 has 72 divisors (see below), whose sum is σ = 41705299440. Its totient is φ = 6824893440.

The previous prime is 18139963871. The next prime is 18139963901. The reversal of 18139963900 is 936993181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18139963901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4518294 + ... + 4522306.

It is an arithmetic number, because the mean of its divisors is an integer number (579240270).

Almost surely, 2^18139963900 is an apocalyptic number.

18139963900 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 18139963900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20852649720).

18139963900 is an abundant number, since it is smaller than the sum of its proper divisors (23565335540).

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

18139963900 is a wasteful number, since it uses less digits than its factorization.

18139963900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703 (or 6696 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 49.

The spelling of 18139963900 in words is "eighteen billion, one hundred thirty-nine million, nine hundred sixty-three thousand, nine hundred".