18877390848 has 392 divisors, whose sum is σ = 59091842700. Its totient is φ = 6019743744.

The previous prime is 18877390823. The next prime is 18877390849. The reversal of 18877390848 is 84809377881.

It can be written as a sum of positive squares in 2 ways, for example, as 18635526144 + 241864704 = 136512^2 + 15552^2 .

It is not an unprimeable number, because it can be changed into a prime (18877390849) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 173187018 + ... + 173187126.

Almost surely, 2^18877390848 is an apocalyptic number.

18877390848 is a gapful number since it is divisible by the number (18) 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 18877390848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29545921350).

18877390848 is an abundant number, since it is smaller than the sum of its proper divisors (40214451852).

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

18877390848 is an frugal number, since it uses more digits than its factorization.

18877390848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 18877390848 in words is "eighteen billion, eight hundred seventy-seven million, three hundred ninety thousand, eight hundred forty-eight".