19218340458 has 24 divisors (see below), whose sum is σ = 41643997668. Its totient is φ = 6405458112.

The previous prime is 19218340447. The next prime is 19218340487. The reversal of 19218340458 is 85404381291.

19218340458 is a `hidden beast` number, since 19 + 2 + 183 + 4 + 0 + 458 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19086251409 + 132089049 = 138153^2 + 11493^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146166 + ... + 244542.

Almost surely, 2^19218340458 is an apocalyptic number.

19218340458 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19218340458 is an abundant number, since it is smaller than the sum of its proper divisors (22425657210).

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

19218340458 is a wasteful number, since it uses less digits than its factorization.

19218340458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109238 (or 109235 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 19218340458 in words is "nineteen billion, two hundred eighteen million, three hundred forty thousand, four hundred fifty-eight".