18969729120 has 192 divisors, whose sum is σ = 68014054080. Its totient is φ = 4935168000.

The previous prime is 18969729109. The next prime is 18969729127. The reversal of 18969729120 is 2192796981.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969729127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123570 + ... + 230670.

It is an arithmetic number, because the mean of its divisors is an integer number (354239865).

Almost surely, 2^18969729120 is an apocalyptic number.

18969729120 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 18969729120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34007027040).

18969729120 is an abundant number, since it is smaller than the sum of its proper divisors (49044324960).

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

18969729120 is a wasteful number, since it uses less digits than its factorization.

18969729120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107166 (or 107152 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 18969729120 in words is "eighteen billion, nine hundred sixty-nine million, seven hundred twenty-nine thousand, one hundred twenty".