21342004207 has 2 divisors, whose sum is σ = 21342004208. Its totient is φ = 21342004206.

The previous prime is 21342004199. The next prime is 21342004213. The reversal of 21342004207 is 70240024312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21342004207 - 2³ = 21342004199 is a prime.

It is a super-2 number, since 2×21342004207² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21342004217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671002103 + 10671002104.

It is an arithmetic number, because the mean of its divisors is an integer number (10671002104).

Almost surely, 2^21342004207 is an apocalyptic number.

21342004207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342004207 is an equidigital number, since it uses as much as digits as its factorization.

21342004207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

Adding to 21342004207 its reverse (70240024312), we get a palindrome (91582028519).

The spelling of 21342004207 in words is "twenty-one billion, three hundred forty-two million, four thousand, two hundred seven".