199134018 has 64 divisors (see below), whose sum is σ = 466698240. Its totient is φ = 62845200.

The previous prime is 199133969. The next prime is 199134031. The reversal of 199134018 is 810431991.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77413 + ... + 79943.

It is an arithmetic number, because the mean of its divisors is an integer number (7292160).

Almost surely, 2^199134018 is an apocalyptic number.

199134018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 199134018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233349120).

199134018 is an abundant number, since it is smaller than the sum of its proper divisors (267564222).

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

199134018 is a wasteful number, since it uses less digits than its factorization.

199134018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 199134018 is about 14111.4853222473. The cubic root of 199134018 is about 583.9582775754.

The spelling of 199134018 in words is "one hundred ninety-nine million, one hundred thirty-four thousand, eighteen".