20041405511 has 16 divisors (see below), whose sum is σ = 21187305216. Its totient is φ = 18918879936.

The previous prime is 20041405493. The next prime is 20041405513. The reversal of 20041405511 is 11550414002.

It is a cyclic number.

It is not a de Polignac number, because 20041405511 - 2¹⁴ = 20041389127 is a prime.

It is a super-2 number, since 2×20041405511² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20041405513) 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 15 ways as a sum of consecutive naturals, for example, 1966916 + ... + 1977078.

It is an arithmetic number, because the mean of its divisors is an integer number (1324206576).

Almost surely, 2^20041405511 is an apocalyptic number.

20041405511 is a deficient number, since it is larger than the sum of its proper divisors (1145899705).

20041405511 is a wasteful number, since it uses less digits than its factorization.

20041405511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11302.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 20041405511 its reverse (11550414002), we get a palindrome (31591819513).

The spelling of 20041405511 in words is "twenty billion, forty-one million, four hundred five thousand, five hundred eleven".