2001783420202 has 4 divisors (see below), whose sum is σ = 3002675130306. Its totient is φ = 1000891710100.

The previous prime is 2001783420191. The next prime is 2001783420211. The reversal of 2001783420202 is 2020243871002.

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., 1790781916401 + 211001503801 = 1338201^2 + 459349^2 .

It is a super-2 number, since 2×2001783420202² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500445855049 + ... + 500445855052.

Almost surely, 2^{2001783420202} is an apocalyptic number.

2001783420202 is a deficient number, since it is larger than the sum of its proper divisors (1000891710104).

2001783420202 is a wasteful number, since it uses less digits than its factorization.

2001783420202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000891710103.

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 2001783420202 in words is "two trillion, one billion, seven hundred eighty-three million, four hundred twenty thousand, two hundred two".