421819814 has 16 divisors (see below), whose sum is σ = 688021152. Its totient is φ = 192794688.

The previous prime is 421819813. The next prime is 421819829. The reversal of 421819814 is 418918124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421819813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76079 + ... + 81434.

It is an arithmetic number, because the mean of its divisors is an integer number (43001322).

Almost surely, 2^421819814 is an apocalyptic number.

421819814 is a deficient number, since it is larger than the sum of its proper divisors (266201338).

421819814 is a wasteful number, since it uses less digits than its factorization.

421819814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157631.

The product of its digits is 18432, while the sum is 38.

The square root of 421819814 is about 20538.2524573051. The cubic root of 421819814 is about 749.9672957591.

The spelling of 421819814 in words is "four hundred twenty-one million, eight hundred nineteen thousand, eight hundred fourteen".