20001562170 has 16 divisors (see below), whose sum is σ = 48003749280. Its totient is φ = 5333749904.

The previous prime is 20001562159. The next prime is 20001562171. The reversal of 20001562170 is 7126510002.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001562170.

It is not an unprimeable number, because it can be changed into a prime (20001562171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333359340 + ... + 333359399.

It is an arithmetic number, because the mean of its divisors is an integer number (3000234330).

Almost surely, 2^20001562170 is an apocalyptic number.

20001562170 is an abundant number, since it is smaller than the sum of its proper divisors (28002187110).

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

20001562170 is a wasteful number, since it uses less digits than its factorization.

20001562170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666718749.

The product of its (nonzero) digits is 840, while the sum is 24.

The spelling of 20001562170 in words is "twenty billion, one million, five hundred sixty-two thousand, one hundred seventy".