2001503423 has 4 divisors (see below), whose sum is σ = 2002888080. Its totient is φ = 2000118768.

The previous prime is 2001503393. The next prime is 2001503429. The reversal of 2001503423 is 3243051002.

It is a happy number.

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 2001503423 - 2⁶ = 2001503359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001503395 and 2001503404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001503429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690158 + ... + 693051.

It is an arithmetic number, because the mean of its divisors is an integer number (500722020).

Almost surely, 2^2001503423 is an apocalyptic number.

2001503423 is a deficient number, since it is larger than the sum of its proper divisors (1384657).

2001503423 is a wasteful number, since it uses less digits than its factorization.

2001503423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384656.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2001503423 is about 44738.1651724789. The cubic root of 2001503423 is about 1260.2366698705.

Adding to 2001503423 its reverse (3243051002), we get a palindrome (5244554425).

The spelling of 2001503423 in words is "two billion, one million, five hundred three thousand, four hundred twenty-three".