2001204045 has 24 divisors (see below), whose sum is σ = 3672799416. Its totient is φ = 1004525568.

The previous prime is 2001204019. The next prime is 2001204053. The reversal of 2001204045 is 5404021002.

It can be written as a sum of positive squares in 4 ways, for example, as 357550281 + 1643653764 = 18909^2 + 40542^2 .

It is not a de Polignac number, because 2001204045 - 2¹¹ = 2001201997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1307212 + ... + 1308741.

It is an arithmetic number, because the mean of its divisors is an integer number (153033309).

Almost surely, 2^2001204045 is an apocalyptic number.

It is an amenable number.

2001204045 is a deficient number, since it is larger than the sum of its proper divisors (1671595371).

2001204045 is a wasteful number, since it uses less digits than its factorization.

2001204045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615981 (or 2615978 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2001204045 is about 44734.8191568939. The cubic root of 2001204045 is about 1260.1738327814.

Adding to 2001204045 its reverse (5404021002), we get a palindrome (7405225047).

The spelling of 2001204045 in words is "two billion, one million, two hundred four thousand, forty-five".