18139420000 has 120 divisors (see below), whose sum is σ = 48059128656. Its totient is φ = 6697536000.

The previous prime is 18139419983. The next prime is 18139420031. The reversal of 18139420000 is 2493181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 225117 + ... + 294883.

Almost surely, 2^18139420000 is an apocalyptic number.

18139420000 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 18139420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24029564328).

18139420000 is an abundant number, since it is smaller than the sum of its proper divisors (29919708656).

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

18139420000 is an equidigital number, since it uses as much as digits as its factorization.

18139420000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69810 (or 69787 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 18139420000 in words is "eighteen billion, one hundred thirty-nine million, four hundred twenty thousand".