21340107 has 6 divisors (see below), whose sum is σ = 30824612. Its totient is φ = 14226732.

The previous prime is 21340093. The next prime is 21340141. The reversal of 21340107 is 70104312.

It is not a de Polignac number, because 21340107 - 2⁴ = 21340091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21340107.

It is not an unprimeable number, because it can be changed into a prime (21340147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1185553 + ... + 1185570.

Almost surely, 2^21340107 is an apocalyptic number.

21340107 is a deficient number, since it is larger than the sum of its proper divisors (9484505).

21340107 is a wasteful number, since it uses less digits than its factorization.

21340107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371129 (or 2371126 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 21340107 is about 4619.5353662463. The cubic root of 21340107 is about 277.3738603725.

Adding to 21340107 its reverse (70104312), we get a palindrome (91444419).

The spelling of 21340107 in words is "twenty-one million, three hundred forty thousand, one hundred seven".