202042637220 has 96 divisors (see below), whose sum is σ = 570935215872. Its totient is φ = 53381644288.

The previous prime is 202042637191. The next prime is 202042637227. The reversal of 202042637220 is 22736240202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (202042637227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34934449 + ... + 34940231.

It is an arithmetic number, because the mean of its divisors is an integer number (5947241832).

Almost surely, 2^202042637220 is an apocalyptic number.

202042637220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202042637220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285467607936).

202042637220 is an abundant number, since it is smaller than the sum of its proper divisors (368892578652).

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

202042637220 is a wasteful number, since it uses less digits than its factorization.

202042637220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061 (or 11059 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

Adding to 202042637220 its reverse (22736240202), we get a palindrome (224778877422).

The spelling of 202042637220 in words is "two hundred two billion, forty-two million, six hundred thirty-seven thousand, two hundred twenty".