18778181282 has 8 divisors (see below), whose sum is σ = 32191167936. Its totient is φ = 8047791972.

The previous prime is 18778181243. The next prime is 18778181311. The reversal of 18778181282 is 28218187781.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670649318 + ... + 670649345.

It is an arithmetic number, because the mean of its divisors is an integer number (4023895992).

Almost surely, 2^18778181282 is an apocalyptic number.

18778181282 is a deficient number, since it is larger than the sum of its proper divisors (13412986654).

18778181282 is a wasteful number, since it uses less digits than its factorization.

18778181282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341298672.

The product of its digits is 802816, while the sum is 53.

The spelling of 18778181282 in words is "eighteen billion, seven hundred seventy-eight million, one hundred eighty-one thousand, two hundred eighty-two".