18878041289 has 16 divisors (see below), whose sum is σ = 20702200320. Its totient is φ = 17134629120.

The previous prime is 18878041253. The next prime is 18878041363. The reversal of 18878041289 is 98214087881.

It is a de Polignac number, because none of the positive numbers 2^k-18878041289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18878041249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403274 + ... + 447644.

It is an arithmetic number, because the mean of its divisors is an integer number (1293887520).

Almost surely, 2^18878041289 is an apocalyptic number.

It is an amenable number.

18878041289 is a deficient number, since it is larger than the sum of its proper divisors (1824159031).

18878041289 is a wasteful number, since it uses less digits than its factorization.

18878041289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45280.

The product of its (nonzero) digits is 2064384, while the sum is 56.

The spelling of 18878041289 in words is "eighteen billion, eight hundred seventy-eight million, forty-one thousand, two hundred eighty-nine".