138023218004 has 24 divisors (see below), whose sum is σ = 277251891840. Its totient is φ = 58894495776.

The previous prime is 138023217977. The next prime is 138023218007. The reversal of 138023218004 is 400812320831.

138023218004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138023218007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10756472 + ... + 10769295.

It is an arithmetic number, because the mean of its divisors is an integer number (11552162160).

Almost surely, 2^138023218004 is an apocalyptic number.

138023218004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138023218004 is an abundant number, since it is smaller than the sum of its proper divisors (139228673836).

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

138023218004 is a wasteful number, since it uses less digits than its factorization.

138023218004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21526007 (or 21526005 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

Adding to 138023218004 its reverse (400812320831), we get a palindrome (538835538835).

The spelling of 138023218004 in words is "one hundred thirty-eight billion, twenty-three million, two hundred eighteen thousand, four".