21140431041 has 4 divisors (see below), whose sum is σ = 28187241392. Its totient is φ = 14093620692.

The previous prime is 21140431027. The next prime is 21140431043. The reversal of 21140431041 is 14013404112.

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.

It is not a de Polignac number, because 21140431041 - 2⁶ = 21140430977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21140430999 and 21140431017.

It is not an unprimeable number, because it can be changed into a prime (21140431043) 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 3 ways as a sum of consecutive naturals, for example, 3523405171 + ... + 3523405176.

It is an arithmetic number, because the mean of its divisors is an integer number (7046810348).

Almost surely, 2^21140431041 is an apocalyptic number.

It is an amenable number.

21140431041 is a deficient number, since it is larger than the sum of its proper divisors (7046810351).

21140431041 is an equidigital number, since it uses as much as digits as its factorization.

21140431041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7046810350.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21140431041 its reverse (14013404112), we get a palindrome (35153835153).

The spelling of 21140431041 in words is "twenty-one billion, one hundred forty million, four hundred thirty-one thousand, forty-one".