2001990202 has 4 divisors (see below), whose sum is σ = 3002985306. Its totient is φ = 1000995100.

The previous prime is 2001990181. The next prime is 2001990257. The reversal of 2001990202 is 2020991002.

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., 1266007561 + 735982641 = 35581^2 + 27129^2 .

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, 500497549 + ... + 500497552.

Almost surely, 2^2001990202 is an apocalyptic number.

2001990202 is a deficient number, since it is larger than the sum of its proper divisors (1000995104).

2001990202 is a wasteful number, since it uses less digits than its factorization.

2001990202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000995103.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2001990202 is about 44743.6051520214. The cubic root of 2001990202 is about 1260.3388275807.

The spelling of 2001990202 in words is "two billion, one million, nine hundred ninety thousand, two hundred two".