18355518353854 has 16 divisors (see below), whose sum is σ = 30037041152640. Its totient is φ = 8343212324760.

The previous prime is 18355518353827. The next prime is 18355518353891. The reversal of 18355518353854 is 45835381555381.

It is a happy number.

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, 9338364 + ... + 11131759.

It is an arithmetic number, because the mean of its divisors is an integer number (1877315072040).

Almost surely, 2^{18355518353854} is an apocalyptic number.

18355518353854 is a deficient number, since it is larger than the sum of its proper divisors (11681522798786).

18355518353854 is a wasteful number, since it uses less digits than its factorization.

18355518353854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20510895.

The product of its digits is 172800000, while the sum is 64.

The spelling of 18355518353854 in words is "eighteen trillion, three hundred fifty-five billion, five hundred eighteen million, three hundred fifty-three thousand, eight hundred fifty-four".