20139737175054 has 144 divisors (see below), whose sum is σ = 52985244469248. Its totient is φ = 5414772835584.

The previous prime is 20139737175023. The next prime is 20139737175073. The reversal of 20139737175054 is 45057173793102.

20139737175054 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 97 + 37 + 17 + 505 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 220149727 + ... + 220241189.

It is an arithmetic number, because the mean of its divisors is an integer number (367953086592).

Almost surely, 2^{20139737175054} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20139737175054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26492622234624).

20139737175054 is an abundant number, since it is smaller than the sum of its proper divisors (32845507294194).

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

20139737175054 is a wasteful number, since it uses less digits than its factorization.

20139737175054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97559 (or 97539 counting only the distinct ones).

The product of its (nonzero) digits is 5556600, while the sum is 54.

The spelling of 20139737175054 in words is "twenty trillion, one hundred thirty-nine billion, seven hundred thirty-seven million, one hundred seventy-five thousand, fifty-four".