19703135268 has 144 divisors (see below), whose sum is σ = 51542050560. Its totient is φ = 6343142400.

The previous prime is 19703135267. The next prime is 19703135323. The reversal of 19703135268 is 86253130791.

19703135268 is a `hidden beast` number, since 1 + 9 + 70 + 313 + 5 + 268 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19703135267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81755628 + ... + 81755868.

Almost surely, 2^19703135268 is an apocalyptic number.

19703135268 is a gapful number since it is divisible by the number (18) 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 19703135268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25771025280).

19703135268 is an abundant number, since it is smaller than the sum of its proper divisors (31838915292).

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

19703135268 is a wasteful number, since it uses less digits than its factorization.

19703135268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 19703135268 in words is "nineteen billion, seven hundred three million, one hundred thirty-five thousand, two hundred sixty-eight".