189205405430 has 64 divisors (see below), whose sum is σ = 352909001088. Its totient is φ = 72999014400.

The previous prime is 189205405429. The next prime is 189205405439. The reversal of 189205405430 is 34504502981.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189205405439) 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, 7750724 + ... + 7775096.

It is an arithmetic number, because the mean of its divisors is an integer number (5514203142).

Almost surely, 2^189205405430 is an apocalyptic number.

189205405430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189205405430 is a deficient number, since it is larger than the sum of its proper divisors (163703595658).

189205405430 is a wasteful number, since it uses less digits than its factorization.

189205405430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24681.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 189205405430 in words is "one hundred eighty-nine billion, two hundred five million, four hundred five thousand, four hundred thirty".