18877947648 has 288 divisors, whose sum is σ = 62536588800. Its totient is φ = 4932845568.

The previous prime is 18877947617. The next prime is 18877947661. The reversal of 18877947648 is 84674977881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2958990 + ... + 2965362.

Almost surely, 2^18877947648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18877947648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31268294400).

18877947648 is an abundant number, since it is smaller than the sum of its proper divisors (43658641152).

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

18877947648 is a wasteful number, since it uses less digits than its factorization.

18877947648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447 (or 6433 counting only the distinct ones).

The product of its digits is 151732224, while the sum is 69.

The spelling of 18877947648 in words is "eighteen billion, eight hundred seventy-seven million, nine hundred forty-seven thousand, six hundred forty-eight".