19508428718 has 4 divisors (see below), whose sum is σ = 29262643080. Its totient is φ = 9754214358.

The previous prime is 19508428703. The next prime is 19508428759. The reversal of 19508428718 is 81782480591.

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

It is a super-3 number, since 3×19508428718³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19508428718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4877107178 + ... + 4877107181.

It is an arithmetic number, because the mean of its divisors is an integer number (7315660770).

Almost surely, 2^19508428718 is an apocalyptic number.

19508428718 is a deficient number, since it is larger than the sum of its proper divisors (9754214362).

19508428718 is an equidigital number, since it uses as much as digits as its factorization.

19508428718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754214361.

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 19508428718 in words is "nineteen billion, five hundred eight million, four hundred twenty-eight thousand, seven hundred eighteen".