20611413 has 12 divisors (see below), whose sum is σ = 29902860. Its totient is φ = 13680576.

The previous prime is 20611403. The next prime is 20611439. The reversal of 20611413 is 31411602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11985444 + 8625969 = 3462^2 + 2937^2 .

It is not a de Polignac number, because 20611413 - 2¹⁸ = 20349269 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2818 + ... + 7011.

It is an arithmetic number, because the mean of its divisors is an integer number (2491905).

Almost surely, 2^20611413 is an apocalyptic number.

It is an amenable number.

20611413 is a deficient number, since it is larger than the sum of its proper divisors (9291447).

20611413 is a wasteful number, since it uses less digits than its factorization.

20611413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068 (or 10065 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20611413 is about 4539.9794052396. The cubic root of 20611413 is about 274.1800945414.

The spelling of 20611413 in words is "twenty million, six hundred eleven thousand, four hundred thirteen".