420235710823 has 2 divisors, whose sum is σ = 420235710824. Its totient is φ = 420235710822.

The previous prime is 420235710787. The next prime is 420235710827. The reversal of 420235710823 is 328017532024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420235710823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420235710827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210117855411 + 210117855412.

It is an arithmetic number, because the mean of its divisors is an integer number (210117855412).

Almost surely, 2^420235710823 is an apocalyptic number.

420235710823 is a deficient number, since it is larger than the sum of its proper divisors (1).

420235710823 is an equidigital number, since it uses as much as digits as its factorization.

420235710823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 420235710823 in words is "four hundred twenty billion, two hundred thirty-five million, seven hundred ten thousand, eight hundred twenty-three".