21423422412407 has 2 divisors, whose sum is σ = 21423422412408. Its totient is φ = 21423422412406.

The previous prime is 21423422412389. The next prime is 21423422412467. The reversal of 21423422412407 is 70421422432412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21423422412407 - 2²⁸ = 21423153976951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21423422412467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711711206203 + 10711711206204.

It is an arithmetic number, because the mean of its divisors is an integer number (10711711206204).

Almost surely, 2^{21423422412407} is an apocalyptic number.

21423422412407 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423422412407 is an equidigital number, since it uses as much as digits as its factorization.

21423422412407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172032, while the sum is 38.

Adding to 21423422412407 its reverse (70421422432412), we get a palindrome (91844844844819).

The spelling of 21423422412407 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-two million, four hundred twelve thousand, four hundred seven".