420663242020253 has 16 divisors (see below), whose sum is σ = 427971962019840. Its totient is φ = 413396358880896.

The previous prime is 420663242020201. The next prime is 420663242020267. The reversal of 420663242020253 is 352020242366024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420663242020253 - 2⁴⁴ = 403071055975837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420663242020253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420663242020453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1727540276 + ... + 1727783762.

It is an arithmetic number, because the mean of its divisors is an integer number (26748247626240).

Almost surely, 2^{420663242020253} is an apocalyptic number.

It is an amenable number.

420663242020253 is a deficient number, since it is larger than the sum of its proper divisors (7308719999587).

420663242020253 is a wasteful number, since it uses less digits than its factorization.

420663242020253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329276.

The product of its (nonzero) digits is 829440, while the sum is 41.

Adding to 420663242020253 its reverse (352020242366024), we get a palindrome (772683484386277).

The spelling of 420663242020253 in words is "four hundred twenty trillion, six hundred sixty-three billion, two hundred forty-two million, twenty thousand, two hundred fifty-three".