18771374143684 has 18 divisors (see below), whose sum is σ = 33159782525870. Its totient is φ = 9297970347552.

The previous prime is 18771374143681. The next prime is 18771374143811. The reversal of 18771374143684 is 48634147317781.

It can be written as a sum of positive squares in only one way, i.e., 14793423673284 + 3977950470400 = 3846222^2 + 1994480^2 .

It is not an unprimeable number, because it can be changed into a prime (18771374143681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204899769 + ... + 204991360.

Almost surely, 2^{18771374143684} is an apocalyptic number.

It is an amenable number.

18771374143684 is a deficient number, since it is larger than the sum of its proper divisors (14388408382186).

18771374143684 is a wasteful number, since it uses less digits than its factorization.

18771374143684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409891347 (or 409891238 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 64.

The spelling of 18771374143684 in words is "eighteen trillion, seven hundred seventy-one billion, three hundred seventy-four million, one hundred forty-three thousand, six hundred eighty-four".