189912924100 has 27 divisors (see below), whose sum is σ = 412120502157. Its totient is φ = 75963426480.

The previous prime is 189912924023. The next prime is 189912924101. The reversal of 189912924100 is 1429219981.

The square root of 189912924100 is 435790.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 68368652676 + 121544271424 = 261474^2 + 348632^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189912924101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4336111 + ... + 4379689.

Almost surely, 2^189912924100 is an apocalyptic number.

189912924100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189912924100 is the 435790-th square number.

It is an amenable number.

189912924100 is an abundant number, since it is smaller than the sum of its proper divisors (222207578057).

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

189912924100 is an frugal number, since it uses more digits than its factorization.

189912924100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87172 (or 43586 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 189912924100 in words is "one hundred eighty-nine billion, nine hundred twelve million, nine hundred twenty-four thousand, one hundred".