18965478000 has 640 divisors, whose sum is σ = 75543736320. Its totient is φ = 3997593600.

The previous prime is 18965477959. The next prime is 18965478031. The reversal of 18965478000 is 87456981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28013662 + ... + 28014338.

It is an arithmetic number, because the mean of its divisors is an integer number (118037088).

Almost surely, 2^18965478000 is an apocalyptic number.

18965478000 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 18965478000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37771868160).

18965478000 is an abundant number, since it is smaller than the sum of its proper divisors (56578258320).

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

18965478000 is a wasteful number, since it uses less digits than its factorization.

18965478000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 18965478000 in words is "eighteen billion, nine hundred sixty-five million, four hundred seventy-eight thousand".