12423455432420 has 48 divisors (see below), whose sum is σ = 26149475553600. Its totient is φ = 4957922825856.

The previous prime is 12423455432369. The next prime is 12423455432441. The reversal of 12423455432420 is 2423455432421.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17839931 + ... + 18523229.

It is an arithmetic number, because the mean of its divisors is an integer number (544780740700).

Almost surely, 2^{12423455432420} is an apocalyptic number.

12423455432420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12423455432420 is an abundant number, since it is smaller than the sum of its proper divisors (13726020121180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12423455432420 is a wasteful number, since it uses less digits than its factorization.

12423455432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685404 (or 685402 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 41.

Subtracting from 12423455432420 its reverse (2423455432421), we obtain a palindrome (9999999999999).

The spelling of 12423455432420 in words is "twelve trillion, four hundred twenty-three billion, four hundred fifty-five million, four hundred thirty-two thousand, four hundred twenty".