209740107020 has 12 divisors (see below), whose sum is σ = 440454224784. Its totient is φ = 83896042800.

The previous prime is 209740106957. The next prime is 209740107077. The reversal of 209740107020 is 20701047902.

It is a super-2 number, since 2×209740107020² (a number of 23 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 5243502656 + ... + 5243502695.

It is an arithmetic number, because the mean of its divisors is an integer number (36704518732).

Almost surely, 2^209740107020 is an apocalyptic number.

209740107020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209740107020 is an abundant number, since it is smaller than the sum of its proper divisors (230714117764).

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

209740107020 is a wasteful number, since it uses less digits than its factorization.

209740107020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487005360 (or 10487005358 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 209740107020 in words is "two hundred nine billion, seven hundred forty million, one hundred seven thousand, twenty".