18779478201 has 12 divisors (see below), whose sum is σ = 29591905200. Its totient is φ = 11381501880.

The previous prime is 18779478199. The next prime is 18779478241. The reversal of 18779478201 is 10287497781.

18779478201 is a `hidden beast` number, since 1 + 87 + 79 + 478 + 20 + 1 = 666.

It is not a de Polignac number, because 18779478201 - 2¹ = 18779478199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18779478241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94845751 + ... + 94845948.

It is an arithmetic number, because the mean of its divisors is an integer number (2465992100).

Almost surely, 2^18779478201 is an apocalyptic number.

18779478201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18779478201 is a deficient number, since it is larger than the sum of its proper divisors (10812426999).

18779478201 is a wasteful number, since it uses less digits than its factorization.

18779478201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189691716 (or 189691713 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 54.

The spelling of 18779478201 in words is "eighteen billion, seven hundred seventy-nine million, four hundred seventy-eight thousand, two hundred one".