19886748 has 72 divisors (see below), whose sum is σ = 55770624. Its totient is φ = 5493600.

The previous prime is 19886747. The next prime is 19886759. The reversal of 19886748 is 84768891.

It is a self number, because there is not a number n which added to its sum of digits gives 19886748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19886747) 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, 17683 + ... + 18773.

It is an arithmetic number, because the mean of its divisors is an integer number (774592).

Almost surely, 2^19886748 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 19886748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27885312).

19886748 is an abundant number, since it is smaller than the sum of its proper divisors (35883876).

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

19886748 is a wasteful number, since it uses less digits than its factorization.

19886748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1134 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 19886748 is about 4459.4560206375. The cubic root of 19886748 is about 270.9284361446.

The spelling of 19886748 in words is "nineteen million, eight hundred eighty-six thousand, seven hundred forty-eight".