19893648 has 20 divisors (see below), whose sum is σ = 51392048. Its totient is φ = 6631200.

The previous prime is 19893647. The next prime is 19893659. The reversal of 19893648 is 84639891.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 414451 = 19893648 / (1 + 9 + 8 + 9 + 3 + 6 + 4 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 19893597 and 19893606.

It is not an unprimeable number, because it can be changed into a prime (19893647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207178 + ... + 207273.

Almost surely, 2^19893648 is an apocalyptic number.

It is an amenable number.

19893648 is an abundant number, since it is smaller than the sum of its proper divisors (31498400).

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

19893648 is a wasteful number, since it uses less digits than its factorization.

19893648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414462 (or 414456 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 19893648 is about 4460.2295905032. The cubic root of 19893648 is about 270.9597667245.

The spelling of 19893648 in words is "nineteen million, eight hundred ninety-three thousand, six hundred forty-eight".