19776794112 has 240 divisors, whose sum is σ = 60650461872. Its totient is φ = 6429818880.

The previous prime is 19776794111. The next prime is 19776794129. The reversal of 19776794112 is 21149767791.

It is a happy number.

19776794112 is a `hidden beast` number, since 1 + 97 + 76 + 79 + 411 + 2 = 666.

It is a super-2 number, since 2×19776794112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19776794111) 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, 5099118 + ... + 5102994.

Almost surely, 2^19776794112 is an apocalyptic number.

19776794112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19776794112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30325230936).

19776794112 is an abundant number, since it is smaller than the sum of its proper divisors (40873667760).

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

19776794112 is an frugal number, since it uses more digits than its factorization.

19776794112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951 (or 3923 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The spelling of 19776794112 in words is "nineteen billion, seven hundred seventy-six million, seven hundred ninety-four thousand, one hundred twelve".