20131841 has 4 divisors (see below), whose sum is σ = 20142000. Its totient is φ = 20121684.

The previous prime is 20131819. The next prime is 20131871. The reversal of 20131841 is 14813102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20131841 - 2¹⁸ = 19869697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20131801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031 + ... + 6428.

It is an arithmetic number, because the mean of its divisors is an integer number (5035500).

Almost surely, 2^20131841 is an apocalyptic number.

It is an amenable number.

20131841 is a deficient number, since it is larger than the sum of its proper divisors (10159).

20131841 is an equidigital number, since it uses as much as digits as its factorization.

20131841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 20131841 is about 4486.8520144975. The cubic root of 20131841 is about 272.0369083783.

Adding to 20131841 its reverse (14813102), we get a palindrome (34944943).

The spelling of 20131841 in words is "twenty million, one hundred thirty-one thousand, eight hundred forty-one".