219727442368 has 28 divisors (see below), whose sum is σ = 498310450672. Its totient is φ = 94168903680.

The previous prime is 219727442323. The next prime is 219727442377. The reversal of 219727442368 is 863244727912.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×219727442368² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245231073 + ... + 245231968.

Almost surely, 2^219727442368 is an apocalyptic number.

219727442368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

219727442368 is an abundant number, since it is smaller than the sum of its proper divisors (278583008304).

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

219727442368 is an equidigital number, since it uses as much as digits as its factorization.

219727442368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490463060 (or 490463050 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The spelling of 219727442368 in words is "two hundred nineteen billion, seven hundred twenty-seven million, four hundred forty-two thousand, three hundred sixty-eight".