189834420336 has 160 divisors (see below), whose sum is σ = 568555324416. Its totient is φ = 53941248000.

The previous prime is 189834420299. The next prime is 189834420341. The reversal of 189834420336 is 633024438981.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2393476 + ... + 2471516.

Almost surely, 2^189834420336 is an apocalyptic number.

189834420336 is a gapful number since it is divisible by the number (16) 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 189834420336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284277662208).

189834420336 is an abundant number, since it is smaller than the sum of its proper divisors (378720904080).

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

189834420336 is a wasteful number, since it uses less digits than its factorization.

189834420336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78351 (or 78345 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 189834420336 in words is "one hundred eighty-nine billion, eight hundred thirty-four million, four hundred twenty thousand, three hundred thirty-six".