21423413383643 has 2 divisors, whose sum is σ = 21423413383644. Its totient is φ = 21423413383642.

The previous prime is 21423413383577. The next prime is 21423413383693. The reversal of 21423413383643 is 34638331432412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21423413383643 - 2³⁰ = 21422339641819 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21423413383693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711706691821 + 10711706691822.

It is an arithmetic number, because the mean of its divisors is an integer number (10711706691822).

Almost surely, 2^{21423413383643} is an apocalyptic number.

21423413383643 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423413383643 is an equidigital number, since it uses as much as digits as its factorization.

21423413383643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 47.

The spelling of 21423413383643 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred thirteen million, three hundred eighty-three thousand, six hundred forty-three".