2181727233387 has 24 divisors (see below), whose sum is σ = 3393847648464. Its totient is φ = 1342581701184.

The previous prime is 2181727233379. The next prime is 2181727233409. The reversal of 2181727233387 is 7833327271812.

2181727233387 is a `hidden beast` number, since 2 + 1 + 8 + 1 + 7 + 27 + 233 + 387 = 666.

It is not a de Polignac number, because 2181727233387 - 2³ = 2181727233379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2181727233307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15420733 + ... + 15561569.

It is an arithmetic number, because the mean of its divisors is an integer number (141410318686).

Almost surely, 2^{2181727233387} is an apocalyptic number.

2181727233387 is a deficient number, since it is larger than the sum of its proper divisors (1212120415077).

2181727233387 is a wasteful number, since it uses less digits than its factorization.

2181727233387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273259 (or 273256 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 2181727233387 in words is "two trillion, one hundred eighty-one billion, seven hundred twenty-seven million, two hundred thirty-three thousand, three hundred eighty-seven".