19791268 has 36 divisors (see below), whose sum is σ = 41131776. Its totient is φ = 8154000.

The previous prime is 19791257. The next prime is 19791269. The reversal of 19791268 is 86219791.

It is not an unprimeable number, because it can be changed into a prime (19791269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130993 + ... + 131143.

Almost surely, 2^19791268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19791268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20565888).

19791268 is an abundant number, since it is smaller than the sum of its proper divisors (21340508).

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

19791268 is a wasteful number, since it uses less digits than its factorization.

19791268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 191 counting only the distinct ones).

The product of its digits is 54432, while the sum is 43.

The square root of 19791268 is about 4448.7377985222. The cubic root of 19791268 is about 270.4941476543.

The spelling of 19791268 in words is "nineteen million, seven hundred ninety-one thousand, two hundred sixty-eight".