18771317444 has 48 divisors (see below), whose sum is σ = 37879195200. Its totient is φ = 8049715200.

The previous prime is 18771317441. The next prime is 18771317449. The reversal of 18771317444 is 44471317781.

It is not an unprimeable number, because it can be changed into a prime (18771317441) 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, 154892 + ... + 248060.

It is an arithmetic number, because the mean of its divisors is an integer number (789149900).

Almost surely, 2^18771317444 is an apocalyptic number.

It is an amenable number.

18771317444 is an abundant number, since it is smaller than the sum of its proper divisors (19107877756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18771317444 is a wasteful number, since it uses less digits than its factorization.

18771317444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93444 (or 93442 counting only the distinct ones).

The product of its digits is 526848, while the sum is 47.

The spelling of 18771317444 in words is "eighteen billion, seven hundred seventy-one million, three hundred seventeen thousand, four hundred forty-four".