18771142846 has 8 divisors (see below), whose sum is σ = 28755793440. Its totient is φ = 9185878368.

The previous prime is 18771142829. The next prime is 18771142861. The reversal of 18771142846 is 64824117781.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18771142846.

It is a congruent number.

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, 99846411 + ... + 99846598.

It is an arithmetic number, because the mean of its divisors is an integer number (3594474180).

Almost surely, 2^18771142846 is an apocalyptic number.

18771142846 is a deficient number, since it is larger than the sum of its proper divisors (9984650594).

18771142846 is a wasteful number, since it uses less digits than its factorization.

18771142846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199693058.

The product of its digits is 602112, while the sum is 49.

The spelling of 18771142846 in words is "eighteen billion, seven hundred seventy-one million, one hundred forty-two thousand, eight hundred forty-six".