19867819116 has 24 divisors (see below), whose sum is σ = 46361568960. Its totient is φ = 6622131472.

The previous prime is 19867819087. The next prime is 19867819117. The reversal of 19867819116 is 61191876891.

It is not an unprimeable number, because it can be changed into a prime (19867819117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142375 + ... + 244961.

It is an arithmetic number, because the mean of its divisors is an integer number (1931732040).

Almost surely, 2^19867819116 is an apocalyptic number.

It is an amenable number.

19867819116 is an abundant number, since it is smaller than the sum of its proper divisors (26493749844).

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

19867819116 is a wasteful number, since it uses less digits than its factorization.

19867819116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118733 (or 118731 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 57.

The spelling of 19867819116 in words is "nineteen billion, eight hundred sixty-seven million, eight hundred nineteen thousand, one hundred sixteen".