20312209170 has 96 divisors (see below), whose sum is σ = 57729672000. Its totient is φ = 4914184320.

The previous prime is 20312209123. The next prime is 20312209171. The reversal of 20312209170 is 7190221302.

It is not an unprimeable number, because it can be changed into a prime (20312209171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 473452 + ... + 514568.

It is an arithmetic number, because the mean of its divisors is an integer number (601350750).

Almost surely, 2^20312209170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312209170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28864836000).

20312209170 is an abundant number, since it is smaller than the sum of its proper divisors (37417462830).

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

20312209170 is a wasteful number, since it uses less digits than its factorization.

20312209170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41640 (or 41637 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The spelling of 20312209170 in words is "twenty billion, three hundred twelve million, two hundred nine thousand, one hundred seventy".