18776136906 has 16 divisors (see below), whose sum is σ = 41724748800. Its totient is φ = 6258712284.

The previous prime is 18776136887. The next prime is 18776136923. The reversal of 18776136906 is 60963167781.

It is a happy number.

18776136906 is a `hidden beast` number, since 18 + 7 + 7 + 613 + 6 + 9 + 0 + 6 = 666.

It is a super-2 number, since 2×18776136906² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 347706239 = 18776136906 / (1 + 8 + 7 + 7 + 6 + 1 + 3 + 6 + 9 + 0 + 6).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 173853066 + ... + 173853173.

It is an arithmetic number, because the mean of its divisors is an integer number (2607796800).

Almost surely, 2^18776136906 is an apocalyptic number.

18776136906 is an abundant number, since it is smaller than the sum of its proper divisors (22948611894).

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

18776136906 is a wasteful number, since it uses less digits than its factorization.

18776136906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347706250 (or 347706244 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 18776136906 in words is "eighteen billion, seven hundred seventy-six million, one hundred thirty-six thousand, nine hundred six".