18355044877 has 12 divisors (see below), whose sum is σ = 20115061344. Its totient is φ = 16738971600.

The previous prime is 18355044871. The next prime is 18355044881. The reversal of 18355044877 is 77844055381.

It is not a de Polignac number, because 18355044877 - 2²³ = 18346656269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18355044871) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 640249 + ... + 668302.

It is an arithmetic number, because the mean of its divisors is an integer number (1676255112).

Almost surely, 2^18355044877 is an apocalyptic number.

It is an amenable number.

18355044877 is a deficient number, since it is larger than the sum of its proper divisors (1760016467).

18355044877 is a wasteful number, since it uses less digits than its factorization.

18355044877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308660 (or 1308647 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 52.

The spelling of 18355044877 in words is "eighteen billion, three hundred fifty-five million, forty-four thousand, eight hundred seventy-seven".