421990105338 has 24 divisors (see below), whose sum is σ = 919419789600. Its totient is φ = 139877538504.

The previous prime is 421990105261. The next prime is 421990105349. The reversal of 421990105338 is 833501099124.

It is a happy number.

421990105338 is a `hidden beast` number, since 4 + 2 + 19 + 90 + 10 + 533 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 421990105293 and 421990105302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65482518 + ... + 65488961.

It is an arithmetic number, because the mean of its divisors is an integer number (38309157900).

Almost surely, 2^421990105338 is an apocalyptic number.

421990105338 is an abundant number, since it is smaller than the sum of its proper divisors (497429684262).

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

421990105338 is a wasteful number, since it uses less digits than its factorization.

421990105338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130971666 (or 130971663 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 421990105338 in words is "four hundred twenty-one billion, nine hundred ninety million, one hundred five thousand, three hundred thirty-eight".