189809293500 has 144 divisors (see below), whose sum is σ = 599109245280. Its totient is φ = 50588409600.

The previous prime is 189809293481. The next prime is 189809293519. The reversal of 189809293500 is 5392908981.

189809293500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189809293481) and next prime (189809293519).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9111096 + ... + 9131904.

It is an arithmetic number, because the mean of its divisors is an integer number (4160480870).

Almost surely, 2^189809293500 is an apocalyptic number.

189809293500 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 189809293500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299554622640).

189809293500 is an abundant number, since it is smaller than the sum of its proper divisors (409299951780).

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

189809293500 is a wasteful number, since it uses less digits than its factorization.

189809293500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22861 (or 22846 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 189809293500 in words is "one hundred eighty-nine billion, eight hundred nine million, two hundred ninety-three thousand, five hundred".