2001193845720 has 64 divisors (see below), whose sum is σ = 6319559520000. Its totient is φ = 505564760448.

The previous prime is 2001193845641. The next prime is 2001193845751. The reversal of 2001193845720 is 275483911002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438856020 + ... + 438860579.

It is an arithmetic number, because the mean of its divisors is an integer number (98743117500).

Almost surely, 2^{2001193845720} is an apocalyptic number.

2001193845720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001193845720 is an abundant number, since it is smaller than the sum of its proper divisors (4318365674280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001193845720 is a wasteful number, since it uses less digits than its factorization.

2001193845720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877716632 (or 877716628 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 2001193845720 in words is "two trillion, one billion, one hundred ninety-three million, eight hundred forty-five thousand, seven hundred twenty".