138814746021 has 12 divisors (see below), whose sum is σ = 229154501472. Its totient is φ = 79322711976.

The previous prime is 138814746011. The next prime is 138814746029. The reversal of 138814746021 is 120647418831.

138814746021 is a `hidden beast` number, since 1 + 38 + 8 + 1 + 4 + 7 + 4 + 602 + 1 = 666.

It is not a de Polignac number, because 138814746021 - 2¹⁵ = 138814713253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138814746029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1101704271 + ... + 1101704396.

It is an arithmetic number, because the mean of its divisors is an integer number (19096208456).

Almost surely, 2^138814746021 is an apocalyptic number.

It is an amenable number.

138814746021 is a deficient number, since it is larger than the sum of its proper divisors (90339755451).

138814746021 is a wasteful number, since it uses less digits than its factorization.

138814746021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203408680 (or 2203408677 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 138814746021 in words is "one hundred thirty-eight billion, eight hundred fourteen million, seven hundred forty-six thousand, twenty-one".