19931648 has 40 divisors (see below), whose sum is σ = 43457040. Its totient is φ = 9057280.

The previous prime is 19931623. The next prime is 19931651. The reversal of 19931648 is 84613991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3863 + ... + 7401.

It is an arithmetic number, because the mean of its divisors is an integer number (1086426).

Almost surely, 2^19931648 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 19931648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21728520).

19931648 is an abundant number, since it is smaller than the sum of its proper divisors (23525392).

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

19931648 is an equidigital number, since it uses as much as digits as its factorization.

19931648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568 (or 3552 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 19931648 is about 4464.4874285857. The cubic root of 19931648 is about 271.1321822635.

The spelling of 19931648 in words is "nineteen million, nine hundred thirty-one thousand, six hundred forty-eight".