18982978560 has 880 divisors, whose sum is σ = 83888614656. Its totient is φ = 3997237248.

The previous prime is 18982978517. The next prime is 18982978561. The reversal of 18982978560 is 6587928981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18982978561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 37739269 + ... + 37739771.

Almost surely, 2^18982978560 is an apocalyptic number.

18982978560 is a gapful number since it is divisible by the number (10) 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 18982978560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41944307328).

18982978560 is an abundant number, since it is smaller than the sum of its proper divisors (64905636096).

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

18982978560 is a wasteful number, since it uses less digits than its factorization.

18982978560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 18982978560 in words is "eighteen billion, nine hundred eighty-two million, nine hundred seventy-eight thousand, five hundred sixty".