202142443220 has 12 divisors (see below), whose sum is σ = 424499130804. Its totient is φ = 80856977280.

The previous prime is 202142443207. The next prime is 202142443253. The reversal of 202142443220 is 22344241202.

It can be written as a sum of positive squares in 2 ways, for example, as 30690134596 + 171452308624 = 175186^2 + 414068^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202142443220.

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 3 ways as a sum of consecutive naturals, for example, 5053561061 + ... + 5053561100.

It is an arithmetic number, because the mean of its divisors is an integer number (35374927567).

Almost surely, 2^202142443220 is an apocalyptic number.

202142443220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202142443220 is an abundant number, since it is smaller than the sum of its proper divisors (222356687584).

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

202142443220 is a wasteful number, since it uses less digits than its factorization.

202142443220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10107122170 (or 10107122168 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 202142443220 its reverse (22344241202), we get a palindrome (224486684422).

The spelling of 202142443220 in words is "two hundred two billion, one hundred forty-two million, four hundred forty-three thousand, two hundred twenty".