219621819804 has 48 divisors (see below), whose sum is σ = 517324340736. Its totient is φ = 72511292800.

The previous prime is 219621819799. The next prime is 219621819847. The reversal of 219621819804 is 408918126912.

It is a congruent number.

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, 11753389 + ... + 11772059.

It is an arithmetic number, because the mean of its divisors is an integer number (10777590432).

Almost surely, 2^219621819804 is an apocalyptic number.

It is an amenable number.

219621819804 is an abundant number, since it is smaller than the sum of its proper divisors (297702520932).

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

219621819804 is a wasteful number, since it uses less digits than its factorization.

219621819804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27946 (or 27944 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The spelling of 219621819804 in words is "two hundred nineteen billion, six hundred twenty-one million, eight hundred nineteen thousand, eight hundred four".