2001423403 has 4 divisors (see below), whose sum is σ = 2287341040. Its totient is φ = 1715505768.

The previous prime is 2001423383. The next prime is 2001423421. The reversal of 2001423403 is 3043241002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001423403 - 2²⁵ = 1967868971 is a prime.

It is a super-2 number, since 2×2001423403² = 8011391276152200818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001423103) 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 3 ways as a sum of consecutive naturals, for example, 142958808 + ... + 142958821.

It is an arithmetic number, because the mean of its divisors is an integer number (571835260).

Almost surely, 2^2001423403 is an apocalyptic number.

2001423403 is a deficient number, since it is larger than the sum of its proper divisors (285917637).

2001423403 is an equidigital number, since it uses as much as digits as its factorization.

2001423403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285917636.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2001423403 is about 44737.2708488124. The cubic root of 2001423403 is about 1260.2198749150.

Adding to 2001423403 its reverse (3043241002), we get a palindrome (5044664405).

The spelling of 2001423403 in words is "two billion, one million, four hundred twenty-three thousand, four hundred three".