18013170381 has 16 divisors (see below), whose sum is σ = 25288419840. Its totient is φ = 11373689520.

The previous prime is 18013170359. The next prime is 18013170401. The reversal of 18013170381 is 18307131081.

It is not a de Polignac number, because 18013170381 - 2¹¹ = 18013168333 is a prime.

It is a super-2 number, since 2×18013170381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013170311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182526 + ... + 263328.

It is an arithmetic number, because the mean of its divisors is an integer number (1580526240).

Almost surely, 2^18013170381 is an apocalyptic number.

It is an amenable number.

18013170381 is a deficient number, since it is larger than the sum of its proper divisors (7275249459).

18013170381 is a wasteful number, since it uses less digits than its factorization.

18013170381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84736.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 18013170381 in words is "eighteen billion, thirteen million, one hundred seventy thousand, three hundred eighty-one".