19013049678 has 48 divisors (see below), whose sum is σ = 45263180160. Its totient is φ = 5305963824.

The previous prime is 19013049677. The next prime is 19013049703. The reversal of 19013049678 is 87694031091.

It is a happy number.

It is a super-2 number, since 2×19013049678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19013049677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 739338 + ... + 764621.

It is an arithmetic number, because the mean of its divisors is an integer number (942982920).

Almost surely, 2^19013049678 is an apocalyptic number.

19013049678 is an abundant number, since it is smaller than the sum of its proper divisors (26250130482).

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

19013049678 is a wasteful number, since it uses less digits than its factorization.

19013049678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504021 (or 1504014 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 19013049678 in words is "nineteen billion, thirteen million, forty-nine thousand, six hundred seventy-eight".