18099478158 has 8 divisors (see below), whose sum is σ = 36198956328. Its totient is φ = 6033159384.

The previous prime is 18099478139. The next prime is 18099478273. The reversal of 18099478158 is 85187499081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

18099478158 is an admirable number.

It is a super-2 number, since 2×18099478158² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508289841 + ... + 1508289852.

It is an arithmetic number, because the mean of its divisors is an integer number (4524869541).

Almost surely, 2^18099478158 is an apocalyptic number.

18099478158 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18099478158 is a wasteful number, since it uses less digits than its factorization.

18099478158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016579698.

The product of its (nonzero) digits is 5806080, while the sum is 60.

The spelling of 18099478158 in words is "eighteen billion, ninety-nine million, four hundred seventy-eight thousand, one hundred fifty-eight".