209451950950 has 24 divisors (see below), whose sum is σ = 424997050680. Its totient is φ = 76164345600.

The previous prime is 209451950947. The next prime is 209451950969. The reversal of 209451950950 is 59059154902.

It is a super-2 number, since 2×209451950950² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 209451950894 and 209451950903.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 190410315 + ... + 190411414.

It is an arithmetic number, because the mean of its divisors is an integer number (17708210445).

Almost surely, 2^209451950950 is an apocalyptic number.

209451950950 is an abundant number, since it is smaller than the sum of its proper divisors (215545099730).

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

209451950950 is a wasteful number, since it uses less digits than its factorization.

209451950950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380821752 (or 380821747 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 49.

The spelling of 209451950950 in words is "two hundred nine billion, four hundred fifty-one million, nine hundred fifty thousand, nine hundred fifty".