19227726816 has 24 divisors (see below), whose sum is σ = 50472783144. Its totient is φ = 6409242240.

The previous prime is 19227726811. The next prime is 19227726821. The reversal of 19227726816 is 61862772291.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19227726811) and next prime (19227726821).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19227726811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100144315 + ... + 100144506.

It is an arithmetic number, because the mean of its divisors is an integer number (2103032631).

Almost surely, 2^19227726816 is an apocalyptic number.

19227726816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19227726816 is an abundant number, since it is smaller than the sum of its proper divisors (31245056328).

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

19227726816 is a wasteful number, since it uses less digits than its factorization.

19227726816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200288834 (or 200288826 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 51.

The spelling of 19227726816 in words is "nineteen billion, two hundred twenty-seven million, seven hundred twenty-six thousand, eight hundred sixteen".