420012661823 has 2 divisors, whose sum is σ = 420012661824. Its totient is φ = 420012661822.

The previous prime is 420012661807. The next prime is 420012661883. The reversal of 420012661823 is 328166210024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420012661823 - 2⁴ = 420012661807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420012661883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210006330911 + 210006330912.

It is an arithmetic number, because the mean of its divisors is an integer number (210006330912).

Almost surely, 2^420012661823 is an apocalyptic number.

420012661823 is a deficient number, since it is larger than the sum of its proper divisors (1).

420012661823 is an equidigital number, since it uses as much as digits as its factorization.

420012661823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

Adding to 420012661823 its reverse (328166210024), we get a palindrome (748178871847).

The spelling of 420012661823 in words is "four hundred twenty billion, twelve million, six hundred sixty-one thousand, eight hundred twenty-three".