2001232013 has 4 divisors (see below), whose sum is σ = 2183162208. Its totient is φ = 1819301820.

The previous prime is 2001231989. The next prime is 2001232069. The reversal of 2001232013 is 3102321002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2001232013 - 2⁶ = 2001231949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001232613) 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, 90965081 + ... + 90965102.

It is an arithmetic number, because the mean of its divisors is an integer number (545790552).

Almost surely, 2^2001232013 is an apocalyptic number.

It is an amenable number.

2001232013 is a deficient number, since it is larger than the sum of its proper divisors (181930195).

2001232013 is a wasteful number, since it uses less digits than its factorization.

2001232013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181930194.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2001232013 is about 44735.1317534664. The cubic root of 2001232013 is about 1260.1797033102.

Adding to 2001232013 its reverse (3102321002), we get a palindrome (5103553015).

It can be divided in two parts, 20012 and 32013, that added together give a palindrome (52025).

The spelling of 2001232013 in words is "two billion, one million, two hundred thirty-two thousand, thirteen".