18946201158 has 84 divisors (see below), whose sum is σ = 44906364060. Its totient is φ = 5975776296.

The previous prime is 18946201133. The next prime is 18946201163. The reversal of 18946201158 is 85110264981.

It is a happy number.

18946201158 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 620 + 1 + 15 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 22909141 + ... + 22909967.

Almost surely, 2^18946201158 is an apocalyptic number.

18946201158 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 18946201158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22453182030).

18946201158 is an abundant number, since it is smaller than the sum of its proper divisors (25960162902).

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

18946201158 is an frugal number, since it uses more digits than its factorization.

18946201158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 18946201158 in words is "eighteen billion, nine hundred forty-six million, two hundred one thousand, one hundred fifty-eight".