219418811940 has 72 divisors (see below), whose sum is σ = 629723142720. Its totient is φ = 57084542720.

The previous prime is 219418811939. The next prime is 219418811959. The reversal of 219418811940 is 49118814912.

It is a super-2 number, since 2×219418811940² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 219418811940.

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, 986880 + ... + 1188599.

It is an arithmetic number, because the mean of its divisors is an integer number (8746154760).

Almost surely, 2^219418811940 is an apocalyptic number.

219418811940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

219418811940 is an abundant number, since it is smaller than the sum of its proper divisors (410304330780).

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

219418811940 is a wasteful number, since it uses less digits than its factorization.

219418811940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175573 (or 2175530 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 48.

The spelling of 219418811940 in words is "two hundred nineteen billion, four hundred eighteen million, eight hundred eleven thousand, nine hundred forty".