18106381078424 has 32 divisors (see below), whose sum is σ = 34040934030000. Its totient is φ = 9028806652800.

The previous prime is 18106381078381. The next prime is 18106381078469. The reversal of 18106381078424 is 42487018360181.

It is a super-2 number, since 2×18106381078424² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17762999 + ... + 18754649.

Almost surely, 2^{18106381078424} is an apocalyptic number.

It is an amenable number.

18106381078424 is a deficient number, since it is larger than the sum of its proper divisors (15934552951576).

18106381078424 is a wasteful number, since it uses less digits than its factorization.

18106381078424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997803 (or 997799 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 18106381078424 in words is "eighteen trillion, one hundred six billion, three hundred eighty-one million, seventy-eight thousand, four hundred twenty-four".