19861296 has 80 divisors (see below), whose sum is σ = 63162624. Its totient is φ = 5236992.

The previous prime is 19861291. The next prime is 19861333. The reversal of 19861296 is 69216891.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (19861291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2095 + ... + 6641.

Almost surely, 2^19861296 is an apocalyptic number.

19861296 is a gapful number since it is divisible by the number (16) 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 19861296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31581312).

19861296 is an abundant number, since it is smaller than the sum of its proper divisors (43301328).

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

19861296 is a wasteful number, since it uses less digits than its factorization.

19861296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4578 (or 4572 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 19861296 is about 4456.6013956826. The cubic root of 19861296 is about 270.8128044611.

The spelling of 19861296 in words is "nineteen million, eight hundred sixty-one thousand, two hundred ninety-six".