2001432540 has 48 divisors (see below), whose sum is σ = 5784791040. Its totient is φ = 516498240.

The previous prime is 2001432533. The next prime is 2001432547. The reversal of 2001432540 is 452341002.

It is an interprime number because it is at equal distance from previous prime (2001432533) and next prime (2001432547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001432547) 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, 536160 + ... + 539879.

It is an arithmetic number, because the mean of its divisors is an integer number (120516480).

Almost surely, 2^2001432540 is an apocalyptic number.

2001432540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001432540 is an abundant number, since it is smaller than the sum of its proper divisors (3783358500).

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

2001432540 is a wasteful number, since it uses less digits than its factorization.

2001432540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076082 (or 1076080 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2001432540 is about 44737.3729671289. The cubic root of 2001432540 is about 1260.2217926521.

Adding to 2001432540 its reverse (452341002), we get a palindrome (2453773542).

The spelling of 2001432540 in words is "two billion, one million, four hundred thirty-two thousand, five hundred forty".