2001820018202 has 4 divisors (see below), whose sum is σ = 3002730027306. Its totient is φ = 1000910009100.

The previous prime is 2001820018193. The next prime is 2001820018273. The reversal of 2001820018202 is 2028100281002.

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

It can be written as a sum of positive squares in only one way, i.e., 1961117359201 + 40702659001 = 1400399^2 + 201749^2 .

It is a super-2 number, since 2×2001820018202² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 500455004549 + ... + 500455004552.

Almost surely, 2^{2001820018202} is an apocalyptic number.

2001820018202 is a deficient number, since it is larger than the sum of its proper divisors (1000910009104).

2001820018202 is a wasteful number, since it uses less digits than its factorization.

2001820018202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000910009103.

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 2001820018202 its reverse (2028100281002), we get a palindrome (4029920299204).

The spelling of 2001820018202 in words is "two trillion, one billion, eight hundred twenty million, eighteen thousand, two hundred two".