219418805490 has 32 divisors (see below), whose sum is σ = 526760763840. Its totient is φ = 58494389184.

The previous prime is 219418805369. The next prime is 219418805497. The reversal of 219418805490 is 94508814912.

It is a super-2 number, since 2×219418805490² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (219418805497) 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 15 ways as a sum of consecutive naturals, for example, 977404 + ... + 1180743.

It is an arithmetic number, because the mean of its divisors is an integer number (16461273870).

Almost surely, 2^219418805490 is an apocalyptic number.

219418805490 is an abundant number, since it is smaller than the sum of its proper divisors (307341958350).

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

219418805490 is a wasteful number, since it uses less digits than its factorization.

219418805490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161546.

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 219418805490 in words is "two hundred nineteen billion, four hundred eighteen million, eight hundred five thousand, four hundred ninety".