18348780871 has 32 divisors (see below), whose sum is σ = 20090880000. Its totient is φ = 16700647392.

The previous prime is 18348780869. The next prime is 18348780883. The reversal of 18348780871 is 17808784381.

It is a cyclic number.

It is not a de Polignac number, because 18348780871 - 2¹ = 18348780869 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 (18348780271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14038200 + ... + 14039506.

It is an arithmetic number, because the mean of its divisors is an integer number (627840000).

Almost surely, 2^18348780871 is an apocalyptic number.

18348780871 is a deficient number, since it is larger than the sum of its proper divisors (1742099129).

18348780871 is a wasteful number, since it uses less digits than its factorization.

18348780871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651.

The product of its (nonzero) digits is 2408448, while the sum is 55.

The spelling of 18348780871 in words is "eighteen billion, three hundred forty-eight million, seven hundred eighty thousand, eight hundred seventy-one".