2001891868252 has 96 divisors (see below), whose sum is σ = 3789000633600. Its totient is φ = 922543644672.

The previous prime is 2001891868231. The next prime is 2001891868259. The reversal of 2001891868252 is 2528681981002.

It is a self number, because there is not a number n which added to its sum of digits gives 2001891868252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001891868259) 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, 306612124 + ... + 306618652.

It is an arithmetic number, because the mean of its divisors is an integer number (39468756600).

Almost surely, 2^{2001891868252} is an apocalyptic number.

It is an amenable number.

2001891868252 is a deficient number, since it is larger than the sum of its proper divisors (1787108765348).

2001891868252 is a wasteful number, since it uses less digits than its factorization.

2001891868252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7235 (or 7233 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 2001891868252 in words is "two trillion, one billion, eight hundred ninety-one million, eight hundred sixty-eight thousand, two hundred fifty-two".