19351386912 has 384 divisors, whose sum is σ = 63334656000. Its totient is φ = 5116400640.

The previous prime is 19351386907. The next prime is 19351386913. The reversal of 19351386912 is 21968315391.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (19351386913) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44080389 + ... + 44080827.

It is an arithmetic number, because the mean of its divisors is an integer number (164934000).

Almost surely, 2^19351386912 is an apocalyptic number.

19351386912 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 19351386912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31667328000).

19351386912 is an abundant number, since it is smaller than the sum of its proper divisors (43983269088).

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

19351386912 is a wasteful number, since it uses less digits than its factorization.

19351386912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 487 counting only the distinct ones).

The product of its digits is 349920, while the sum is 48.

The spelling of 19351386912 in words is "nineteen billion, three hundred fifty-one million, three hundred eighty-six thousand, nine hundred twelve".