19678724119 has 6 divisors (see below), whose sum is σ = 20904388904. Its totient is φ = 18521151840.

The previous prime is 19678724101. The next prime is 19678724141. The reversal of 19678724119 is 91142787691.

It is a happy number.

It is not a de Polignac number, because 19678724119 - 2⁷ = 19678723991 is a prime.

It is a super-2 number, since 2×19678724119² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19678724119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19678724419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34045947 + ... + 34046524.

Almost surely, 2^19678724119 is an apocalyptic number.

19678724119 is a deficient number, since it is larger than the sum of its proper divisors (1225664785).

19678724119 is an equidigital number, since it uses as much as digits as its factorization.

19678724119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68092505 (or 68092488 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 55.

The spelling of 19678724119 in words is "nineteen billion, six hundred seventy-eight million, seven hundred twenty-four thousand, one hundred nineteen".