18738228276825 has 24 divisors (see below), whose sum is σ = 31203418999200. Its totient is φ = 9921824463360.

The previous prime is 18738228276809. The next prime is 18738228276869. The reversal of 18738228276825 is 52867282283781.

It is not a de Polignac number, because 18738228276825 - 2⁴ = 18738228276809 is a prime.

It is a super-2 number, since 2×18738228276825² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18738228276825.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 898705560 + ... + 898726409.

It is an arithmetic number, because the mean of its divisors is an integer number (1300142458300).

Almost surely, 2^{18738228276825} is an apocalyptic number.

18738228276825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18738228276825 is a deficient number, since it is larger than the sum of its proper divisors (12465190722375).

18738228276825 is a wasteful number, since it uses less digits than its factorization.

18738228276825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797432121 (or 1797432116 counting only the distinct ones).

The product of its digits is 289013760, while the sum is 69.

The spelling of 18738228276825 in words is "eighteen trillion, seven hundred thirty-eight billion, two hundred twenty-eight million, two hundred seventy-six thousand, eight hundred twenty-five".