421503353642 has 48 divisors (see below), whose sum is σ = 748178817120. Its totient is φ = 177527280672.

The previous prime is 421503353633. The next prime is 421503353659. The reversal of 421503353642 is 246353305124.

It is a junction number, because it is equal to n+sod(n) for n = 421503353596 and 421503353605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22407413 + ... + 22426215.

It is an arithmetic number, because the mean of its divisors is an integer number (15587058690).

Almost surely, 2^421503353642 is an apocalyptic number.

421503353642 is a deficient number, since it is larger than the sum of its proper divisors (326675463478).

421503353642 is a wasteful number, since it uses less digits than its factorization.

421503353642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22755 (or 22748 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 421503353642 its reverse (246353305124), we get a palindrome (667856658766).

The spelling of 421503353642 in words is "four hundred twenty-one billion, five hundred three million, three hundred fifty-three thousand, six hundred forty-two".