21423140011 has 12 divisors (see below), whose sum is σ = 26837780592. Its totient is φ = 16950176208.

The previous prime is 21423140003. The next prime is 21423140029. The reversal of 21423140011 is 11004132412.

It is not a de Polignac number, because 21423140011 - 2³ = 21423140003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21423140911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16815015 + ... + 16816288.

It is an arithmetic number, because the mean of its divisors is an integer number (2236481716).

Almost surely, 2^21423140011 is an apocalyptic number.

21423140011 is a deficient number, since it is larger than the sum of its proper divisors (5414640581).

21423140011 is a wasteful number, since it uses less digits than its factorization.

21423140011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33631330 (or 33631323 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21423140011 its reverse (11004132412), we get a palindrome (32427272423).

The spelling of 21423140011 in words is "twenty-one billion, four hundred twenty-three million, one hundred forty thousand, eleven".