18540893074338 has 40 divisors (see below), whose sum is σ = 41742231878160. Its totient is φ = 6151007169720.

The previous prime is 18540893074331. The next prime is 18540893074391. The reversal of 18540893074338 is 83347039804581.

18540893074338 is a `hidden beast` number, since 1 + 8 + 540 + 89 + 3 + 0 + 7 + 4 + 3 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (18540893074331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 271174248 + ... + 271242611.

It is an arithmetic number, because the mean of its divisors is an integer number (1043555796954).

Almost surely, 2^{18540893074338} is an apocalyptic number.

18540893074338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18540893074338 is an abundant number, since it is smaller than the sum of its proper divisors (23201338803822).

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

18540893074338 is a wasteful number, since it uses less digits than its factorization.

18540893074338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542417084 (or 542417075 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 18540893074338 in words is "eighteen trillion, five hundred forty billion, eight hundred ninety-three million, seventy-four thousand, three hundred thirty-eight".