20311241 has 4 divisors (see below), whose sum is σ = 20320272. Its totient is φ = 20302212.

The previous prime is 20311211. The next prime is 20311273. The reversal of 20311241 is 14211302.

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 20311241 - 2⁶ = 20311177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311211) 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, 1850 + ... + 6636.

It is an arithmetic number, because the mean of its divisors is an integer number (5080068).

Almost surely, 2^20311241 is an apocalyptic number.

It is an amenable number.

20311241 is a deficient number, since it is larger than the sum of its proper divisors (9031).

20311241 is an equidigital number, since it uses as much as digits as its factorization.

20311241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20311241 is about 4506.7994186562. The cubic root of 20311241 is about 272.8425834646.

Adding to 20311241 its reverse (14211302), we get a palindrome (34522543).

The spelling of 20311241 in words is "twenty million, three hundred eleven thousand, two hundred forty-one".