2011813405 has 32 divisors (see below), whose sum is σ = 2954257920. Its totient is φ = 1283758080.

The previous prime is 2011813403. The next prime is 2011813411. The reversal of 2011813405 is 5043181102.

2011813405 = 3273² + 3274² + ... + 3450².

It is not a de Polignac number, because 2011813405 - 2¹ = 2011813403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011813405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011813403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33960 + ... + 71950.

It is an arithmetic number, because the mean of its divisors is an integer number (92320560).

Almost surely, 2^2011813405 is an apocalyptic number.

It is an amenable number.

2011813405 is a deficient number, since it is larger than the sum of its proper divisors (942444515).

2011813405 is a wasteful number, since it uses less digits than its factorization.

2011813405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38109.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 2011813405 is about 44853.2429708265. The cubic root of 2011813405 is about 1262.3968412918.

Adding to 2011813405 its reverse (5043181102), we get a palindrome (7054994507).

The spelling of 2011813405 in words is "two billion, eleven million, eight hundred thirteen thousand, four hundred five".