2001129836 has 24 divisors (see below), whose sum is σ = 3539471040. Its totient is φ = 989878032.

The previous prime is 2001129797. The next prime is 2001129839. The reversal of 2001129836 is 6389211002.

It is not an unprimeable number, because it can be changed into a prime (2001129839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364931 + ... + 370373.

It is an arithmetic number, because the mean of its divisors is an integer number (147477960).

Almost surely, 2^2001129836 is an apocalyptic number.

It is an amenable number.

2001129836 is a deficient number, since it is larger than the sum of its proper divisors (1538341204).

2001129836 is a wasteful number, since it uses less digits than its factorization.

2001129836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6413 (or 6411 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2001129836 is about 44733.9897169926. The cubic root of 2001129836 is about 1260.1582559264.

The spelling of 2001129836 in words is "two billion, one million, one hundred twenty-nine thousand, eight hundred thirty-six".