18969120000 has 360 divisors, whose sum is σ = 70112306880. Its totient is φ = 5057280000.

The previous prime is 18969119999. The next prime is 18969120029. The reversal of 18969120000 is 2196981.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4317805 + ... + 4322195.

It is an arithmetic number, because the mean of its divisors is an integer number (194756408).

Almost surely, 2^18969120000 is an apocalyptic number.

18969120000 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 18969120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35056153440).

18969120000 is an abundant number, since it is smaller than the sum of its proper divisors (51143186880).

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

18969120000 is an frugal number, since it uses more digits than its factorization.

18969120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436 (or 4401 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 18969120000 in words is "eighteen billion, nine hundred sixty-nine million, one hundred twenty thousand".