21040230411 has 20 divisors (see below), whose sum is σ = 31435131112. Its totient is φ = 14024739168.

The previous prime is 21040230361. The next prime is 21040230439. The reversal of 21040230411 is 11403204012.

21040230411 is a `hidden beast` number, since 21 + 0 + 4 + 0 + 230 + 411 = 666.

It is not a de Polignac number, because 21040230411 - 2⁶ = 21040230347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21040230451) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 690351 + ... + 720183.

Almost surely, 2^21040230411 is an apocalyptic number.

21040230411 is a deficient number, since it is larger than the sum of its proper divisors (10394900701).

21040230411 is an equidigital number, since it uses as much as digits as its factorization.

21040230411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38552 (or 38543 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21040230411 its reverse (11403204012), we get a palindrome (32443434423).

The spelling of 21040230411 in words is "twenty-one billion, forty million, two hundred thirty thousand, four hundred eleven".