421003043538 has 64 divisors (see below), whose sum is σ = 1111525244928. Its totient is φ = 102919000320.

The previous prime is 421003043533. The next prime is 421003043557. The reversal of 421003043538 is 835340300124.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 421003043499 and 421003043508.

It is not an unprimeable number, because it can be changed into a prime (421003043533) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 26793970 + ... + 26809677.

It is an arithmetic number, because the mean of its divisors is an integer number (17367581952).

Almost surely, 2^421003043538 is an apocalyptic number.

421003043538 is an abundant number, since it is smaller than the sum of its proper divisors (690522201390).

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

421003043538 is a wasteful number, since it uses less digits than its factorization.

421003043538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53603687.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 421003043538 in words is "four hundred twenty-one billion, three million, forty-three thousand, five hundred thirty-eight".