138838020000 has 120 divisors (see below), whose sum is σ = 455416670016. Its totient is φ = 37023456000.

The previous prime is 138838019993. The next prime is 138838020049. The reversal of 138838020000 is 20838831.

It is a tau number, because it is divible by the number of its divisors (120).

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, 1096984 + ... + 1216983.

Almost surely, 2^138838020000 is an apocalyptic number.

138838020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138838020000 is an abundant number, since it is smaller than the sum of its proper divisors (316578650016).

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

138838020000 is an equidigital number, since it uses as much as digits as its factorization.

138838020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314000 (or 2313977 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

Adding to 138838020000 its reverse (20838831), we get a palindrome (138858858831).

The spelling of 138838020000 in words is "one hundred thirty-eight billion, eight hundred thirty-eight million, twenty thousand".