19642648 has 16 divisors (see below), whose sum is σ = 37525680. Its totient is φ = 9635808.

The previous prime is 19642643. The next prime is 19642661. The reversal of 19642648 is 84624691.

It is a self number, because there is not a number n which added to its sum of digits gives 19642648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19642643) 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, 22740 + ... + 23587.

It is an arithmetic number, because the mean of its divisors is an integer number (2345355).

Almost surely, 2^19642648 is an apocalyptic number.

It is an amenable number.

19642648 is a deficient number, since it is larger than the sum of its proper divisors (17883032).

19642648 is a wasteful number, since it uses less digits than its factorization.

19642648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46386 (or 46382 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 19642648 is about 4432.0027075804. The cubic root of 19642648 is about 269.8153653106.

The spelling of 19642648 in words is "nineteen million, six hundred forty-two thousand, six hundred forty-eight".