189485492920 has 64 divisors (see below), whose sum is σ = 449853264000. Its totient is φ = 71633536128.

The previous prime is 189485492881. The next prime is 189485492923. The reversal of 189485492920 is 29294584981.

189485492920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189485492923) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20919 + ... + 615961.

It is an arithmetic number, because the mean of its divisors is an integer number (7028957250).

Almost surely, 2^189485492920 is an apocalyptic number.

189485492920 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 189485492920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224926632000).

189485492920 is an abundant number, since it is smaller than the sum of its proper divisors (260367771080).

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

189485492920 is a wasteful number, since it uses less digits than its factorization.

189485492920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595492 (or 595488 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 189485492920 in words is "one hundred eighty-nine billion, four hundred eighty-five million, four hundred ninety-two thousand, nine hundred twenty".