18771764877772 has 12 divisors (see below), whose sum is σ = 32851817655496. Its totient is φ = 9385531261920.

The previous prime is 18771764877757. The next prime is 18771764877839. The reversal of 18771764877772 is 27777846717781.

It is a junction number, because it is equal to n+sod(n) for n = 18771764877692 and 18771764877701.

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 3 ways as a sum of consecutive naturals, for example, 87673953 + ... + 87887800.

Almost surely, 2^{18771764877772} is an apocalyptic number.

It is an amenable number.

18771764877772 is a deficient number, since it is larger than the sum of its proper divisors (14080052777724).

18771764877772 is a wasteful number, since it uses less digits than its factorization.

18771764877772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175588488 (or 175588486 counting only the distinct ones).

The product of its digits is 2529924096, while the sum is 79.

The spelling of 18771764877772 in words is "eighteen trillion, seven hundred seventy-one billion, seven hundred sixty-four million, eight hundred seventy-seven thousand, seven hundred seventy-two".