20438173321874 has 128 divisors (see below), whose sum is σ = 41871684741120. Its totient is φ = 7235090150400.

The previous prime is 20438173321873. The next prime is 20438173321883. The reversal of 20438173321874 is 47812337183402.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20438173321873) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 753967829 + ... + 753994935.

It is an arithmetic number, because the mean of its divisors is an integer number (327122537040).

Almost surely, 2^{20438173321874} is an apocalyptic number.

20438173321874 is an abundant number, since it is smaller than the sum of its proper divisors (21433511419246).

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

20438173321874 is a wasteful number, since it uses less digits than its factorization.

20438173321874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37104.

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 20438173321874 in words is "twenty trillion, four hundred thirty-eight billion, one hundred seventy-three million, three hundred twenty-one thousand, eight hundred seventy-four".