18406140888874 has 32 divisors (see below), whose sum is σ = 27832746829824. Its totient is φ = 9128742865200.

The previous prime is 18406140888869. The next prime is 18406140888893. The reversal of 18406140888874 is 47888804160481.

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 15 ways as a sum of consecutive naturals, for example, 1472131707 + ... + 1472144209.

It is an arithmetic number, because the mean of its divisors is an integer number (869773338432).

Almost surely, 2^{18406140888874} is an apocalyptic number.

18406140888874 is a deficient number, since it is larger than the sum of its proper divisors (9426605940950).

18406140888874 is a wasteful number, since it uses less digits than its factorization.

18406140888874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19402.

The product of its (nonzero) digits is 88080384, while the sum is 67.

The spelling of 18406140888874 in words is "eighteen trillion, four hundred six billion, one hundred forty million, eight hundred eighty-eight thousand, eight hundred seventy-four".