18786719770 has 64 divisors (see below), whose sum is σ = 41640480000. Its totient is φ = 5942734848.

The previous prime is 18786719759. The next prime is 18786719779. The reversal of 18786719770 is 7791768781.

It is a junction number, because it is equal to n+sod(n) for n = 18786719699 and 18786719708.

It is not an unprimeable number, because it can be changed into a prime (18786719779) 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 31 ways as a sum of consecutive naturals, for example, 2501481 + ... + 2508979.

It is an arithmetic number, because the mean of its divisors is an integer number (650632500).

Almost surely, 2^18786719770 is an apocalyptic number.

18786719770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18786719770 is an abundant number, since it is smaller than the sum of its proper divisors (22853760230).

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

18786719770 is a wasteful number, since it uses less digits than its factorization.

18786719770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10279.

The product of its (nonzero) digits is 8297856, while the sum is 61.

The spelling of 18786719770 in words is "eighteen billion, seven hundred eighty-six million, seven hundred nineteen thousand, seven hundred seventy".