209473475492 has 6 divisors (see below), whose sum is σ = 366578582118. Its totient is φ = 104736737744.

The previous prime is 209473475467. The next prime is 209473475503. The reversal of 209473475492 is 294574374902.

It can be written as a sum of positive squares in only one way, i.e., 162750923776 + 46722551716 = 403424^2 + 216154^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26184184433 + ... + 26184184440.

It is an arithmetic number, because the mean of its divisors is an integer number (61096430353).

Almost surely, 2^209473475492 is an apocalyptic number.

It is an amenable number.

209473475492 is a deficient number, since it is larger than the sum of its proper divisors (157105106626).

209473475492 is a wasteful number, since it uses less digits than its factorization.

209473475492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52368368877 (or 52368368875 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 209473475492 in words is "two hundred nine billion, four hundred seventy-three million, four hundred seventy-five thousand, four hundred ninety-two".