18418523554 has 16 divisors (see below), whose sum is σ = 29291031000. Its totient is φ = 8656257024.

The previous prime is 18418523339. The next prime is 18418523573. The reversal of 18418523554 is 45532581481.

It can be written as a sum of positive squares in 4 ways, for example, as 12362104225 + 6056419329 = 111185^2 + 77823^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326079 + ... + 378370.

Almost surely, 2^18418523554 is an apocalyptic number.

18418523554 is a deficient number, since it is larger than the sum of its proper divisors (10872507446).

18418523554 is a wasteful number, since it uses less digits than its factorization.

18418523554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705237.

The product of its digits is 768000, while the sum is 46.

The spelling of 18418523554 in words is "eighteen billion, four hundred eighteen million, five hundred twenty-three thousand, five hundred fifty-four".