202002838181 has 4 divisors (see below), whose sum is σ = 213885358092. Its totient is φ = 190120318272.

The previous prime is 202002838151. The next prime is 202002838223. The reversal of 202002838181 is 181838200202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167170588225 + 34832249956 = 408865^2 + 186634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202002838181 is a prime.

It is a super-2 number, since 2×202002838181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202002838151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5941259930 + ... + 5941259963.

It is an arithmetic number, because the mean of its divisors is an integer number (53471339523).

Almost surely, 2^202002838181 is an apocalyptic number.

It is an amenable number.

202002838181 is a deficient number, since it is larger than the sum of its proper divisors (11882519911).

202002838181 is a wasteful number, since it uses less digits than its factorization.

202002838181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11882519910.

The product of its (nonzero) digits is 12288, while the sum is 35.

The spelling of 202002838181 in words is "two hundred two billion, two million, eight hundred thirty-eight thousand, one hundred eighty-one".