19889999814 has 16 divisors (see below), whose sum is σ = 39781381680. Its totient is φ = 6629769600.

The previous prime is 19889999809. The next prime is 19889999821. The reversal of 19889999814 is 41899998891.

It is a super-2 number, since 2×19889999814² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310114 + ... + 368714.

It is an arithmetic number, because the mean of its divisors is an integer number (2486336355).

Almost surely, 2^19889999814 is an apocalyptic number.

19889999814 is an abundant number, since it is smaller than the sum of its proper divisors (19891381866).

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

19889999814 is a wasteful number, since it uses less digits than its factorization.

19889999814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115175.

The product of its digits is 120932352, while the sum is 75.

The spelling of 19889999814 in words is "nineteen billion, eight hundred eighty-nine million, nine hundred ninety-nine thousand, eight hundred fourteen".