20138171072404 has 24 divisors (see below), whose sum is σ = 43937827795008. Its totient is φ = 7846040677440.

The previous prime is 20138171072347. The next prime is 20138171072419. The reversal of 20138171072404 is 40427017183102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32691835849 + ... + 32691836464.

It is an arithmetic number, because the mean of its divisors is an integer number (1830742824792).

Almost surely, 2^{20138171072404} is an apocalyptic number.

It is an amenable number.

20138171072404 is an abundant number, since it is smaller than the sum of its proper divisors (23799656722604).

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

20138171072404 is a wasteful number, since it uses less digits than its factorization.

20138171072404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65383672335 (or 65383672333 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 20138171072404 in words is "twenty trillion, one hundred thirty-eight billion, one hundred seventy-one million, seventy-two thousand, four hundred four".