20113641 has 6 divisors (see below), whose sum is σ = 29053050. Its totient is φ = 13409088.

The previous prime is 20113633. The next prime is 20113649. The reversal of 20113641 is 14631102.

It is a happy number.

20113641 is a `hidden beast` number, since 20 + 1 + 1 + 3 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (20113633) and next prime (20113649).

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 8003241 = 3480^2 + 2829^2 .

It is not a de Polignac number, because 20113641 - 2³ = 20113633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20113649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117416 + ... + 1117433.

It is an arithmetic number, because the mean of its divisors is an integer number (4842175).

Almost surely, 2^20113641 is an apocalyptic number.

It is an amenable number.

20113641 is a deficient number, since it is larger than the sum of its proper divisors (8939409).

20113641 is a wasteful number, since it uses less digits than its factorization.

20113641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234855 (or 2234852 counting only the distinct ones).

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

The square root of 20113641 is about 4484.8234078947. The cubic root of 20113641 is about 271.9549061995.

Adding to 20113641 its reverse (14631102), we get a palindrome (34744743).

The spelling of 20113641 in words is "twenty million, one hundred thirteen thousand, six hundred forty-one".