18773880384 has 168 divisors, whose sum is σ = 58227272928. Its totient is φ = 5322670080.

The previous prime is 18773880383. The next prime is 18773880397. The reversal of 18773880384 is 48308837781.

It is a tau number, because it is divible by the number of its divisors (168).

It is not an unprimeable number, because it can be changed into a prime (18773880383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1224832 + ... + 1240064.

Almost surely, 2^18773880384 is an apocalyptic number.

18773880384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18773880384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29113636464).

18773880384 is an abundant number, since it is smaller than the sum of its proper divisors (39453392544).

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

18773880384 is a wasteful number, since it uses less digits than its factorization.

18773880384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15393 (or 15376 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 57.

The spelling of 18773880384 in words is "eighteen billion, seven hundred seventy-three million, eight hundred eighty thousand, three hundred eighty-four".