21346004105 has 16 divisors (see below), whose sum is σ = 26761584384. Its totient is φ = 16314365760.

The previous prime is 21346004101. The next prime is 21346004107. The reversal of 21346004105 is 50140064312.

It is not a de Polignac number, because 21346004105 - 2² = 21346004101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21346004101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18629 + ... + 207458.

It is an arithmetic number, because the mean of its divisors is an integer number (1672599024).

Almost surely, 2^21346004105 is an apocalyptic number.

It is an amenable number.

21346004105 is a deficient number, since it is larger than the sum of its proper divisors (5415580279).

21346004105 is a wasteful number, since it uses less digits than its factorization.

21346004105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226936.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21346004105 its reverse (50140064312), we get a palindrome (71486068417).

The spelling of 21346004105 in words is "twenty-one billion, three hundred forty-six million, four thousand, one hundred five".