2001031869 has 16 divisors (see below), whose sum is σ = 2826240768. Its totient is φ = 1254991872.

The previous prime is 2001031859. The next prime is 2001032009. The reversal of 2001031869 is 9681301002.

It is not a de Polignac number, because 2001031869 - 2⁴ = 2001031853 is a prime.

It is a super-2 number, since 2×2001031869² = 8008257081507266322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001031859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128124 + ... + 142890.

It is an arithmetic number, because the mean of its divisors is an integer number (176640048).

Almost surely, 2^2001031869 is an apocalyptic number.

It is an amenable number.

2001031869 is a deficient number, since it is larger than the sum of its proper divisors (825208899).

2001031869 is a wasteful number, since it uses less digits than its factorization.

2001031869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17444.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 2001031869 is about 44732.8947084805. The cubic root of 2001031869 is about 1260.1376915538.

The spelling of 2001031869 in words is "two billion, one million, thirty-one thousand, eight hundred sixty-nine".