189205405422 has 32 divisors (see below), whose sum is σ = 423968874624. Its totient is φ = 55785376800.

The previous prime is 189205405399. The next prime is 189205405423. The reversal of 189205405422 is 224504502981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189205405423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38737404 + ... + 38742287.

It is an arithmetic number, because the mean of its divisors is an integer number (13249027332).

Almost surely, 2^189205405422 is an apocalyptic number.

189205405422 is an abundant number, since it is smaller than the sum of its proper divisors (234763469202).

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

189205405422 is a wasteful number, since it uses less digits than its factorization.

189205405422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77479744.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 189205405422 in words is "one hundred eighty-nine billion, two hundred five million, four hundred five thousand, four hundred twenty-two".