209547730146 has 32 divisors (see below), whose sum is σ = 425502499968. Its totient is φ = 68788897920.

The previous prime is 209547730141. The next prime is 209547730163. The reversal of 209547730146 is 641037745902.

It is a junction number, because it is equal to n+sod(n) for n = 209547730095 and 209547730104.

It is not an unprimeable number, because it can be changed into a prime (209547730141) 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, 824811 + ... + 1048526.

It is an arithmetic number, because the mean of its divisors is an integer number (13296953124).

Almost surely, 2^209547730146 is an apocalyptic number.

209547730146 is an abundant number, since it is smaller than the sum of its proper divisors (215954769822).

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

209547730146 is a wasteful number, since it uses less digits than its factorization.

209547730146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873626.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 209547730146 in words is "two hundred nine billion, five hundred forty-seven million, seven hundred thirty thousand, one hundred forty-six".