20431141 has 4 divisors (see below), whose sum is σ = 20983372. Its totient is φ = 19878912.

The previous prime is 20431123. The next prime is 20431171. The reversal of 20431141 is 14113402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14113402 = 2 ⋅7056701.

It can be written as a sum of positive squares in 2 ways, for example, as 19766916 + 664225 = 4446^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 20431141 - 2¹³ = 20422949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431121) 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, 276060 + ... + 276133.

It is an arithmetic number, because the mean of its divisors is an integer number (5245843).

Almost surely, 2^20431141 is an apocalyptic number.

It is an amenable number.

20431141 is a deficient number, since it is larger than the sum of its proper divisors (552231).

20431141 is an equidigital number, since it uses as much as digits as its factorization.

20431141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552230.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20431141 is about 4520.0819682833. The cubic root of 20431141 is about 273.3784060445.

Adding to 20431141 its reverse (14113402), we get a palindrome (34544543).

The spelling of 20431141 in words is "twenty million, four hundred thirty-one thousand, one hundred forty-one".