17919979283 has 4 divisors (see below), whose sum is σ = 17959890600. Its totient is φ = 17880067968.

The previous prime is 17919979279. The next prime is 17919979291. The reversal of 17919979283 is 38297991971.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17919979283 - 2² = 17919979279 is a prime.

It is a super-2 number, since 2×17919979283² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17919909283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19954985 + ... + 19955882.

It is an arithmetic number, because the mean of its divisors is an integer number (4489972650).

Almost surely, 2^17919979283 is an apocalyptic number.

17919979283 is a deficient number, since it is larger than the sum of its proper divisors (39911317).

17919979283 is an equidigital number, since it uses as much as digits as its factorization.

17919979283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39911316.

The product of its digits is 15431472, while the sum is 65.

The spelling of 17919979283 in words is "seventeen billion, nine hundred nineteen million, nine hundred seventy-nine thousand, two hundred eighty-three".