2001332013320 has 16 divisors (see below), whose sum is σ = 4502997030060. Its totient is φ = 800532805312.

The previous prime is 2001332013287. The next prime is 2001332013347. The reversal of 2001332013320 is 233102331002.

It can be written as a sum of positive squares in 2 ways, for example, as 1986335071876 + 14996941444 = 1409374^2 + 122462^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2001332013292 and 2001332013301.

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 in 3 ways as a sum of consecutive naturals, for example, 25016650127 + ... + 25016650206.

Almost surely, 2^{2001332013320} is an apocalyptic number.

2001332013320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001332013320 is an abundant number, since it is smaller than the sum of its proper divisors (2501665016740).

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

2001332013320 is a wasteful number, since it uses less digits than its factorization.

2001332013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50033300344 (or 50033300340 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 2001332013320 its reverse (233102331002), we get a palindrome (2234434344322).

The spelling of 2001332013320 in words is "two trillion, one billion, three hundred thirty-two million, thirteen thousand, three hundred twenty".