209834379474 has 32 divisors (see below), whose sum is σ = 422593459200. Its totient is φ = 69457584000.

The previous prime is 209834379463. The next prime is 209834379479. The reversal of 209834379474 is 474973438902.

It is not an unprimeable number, because it can be changed into a prime (209834379479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3727759 + ... + 3783629.

It is an arithmetic number, because the mean of its divisors is an integer number (13206045600).

Almost surely, 2^209834379474 is an apocalyptic number.

209834379474 is an abundant number, since it is smaller than the sum of its proper divisors (212759079726).

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

209834379474 is a wasteful number, since it uses less digits than its factorization.

209834379474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60226.

The product of its (nonzero) digits is 36578304, while the sum is 60.

The spelling of 209834379474 in words is "two hundred nine billion, eight hundred thirty-four million, three hundred seventy-nine thousand, four hundred seventy-four".