19623648 has 48 divisors (see below), whose sum is σ = 56198016. Its totient is φ = 5946240.

The previous prime is 19623631. The next prime is 19623649. The reversal of 19623648 is 84632691.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19623649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8236 + ... + 10347.

It is an arithmetic number, because the mean of its divisors is an integer number (1170792).

Almost surely, 2^19623648 is an apocalyptic number.

It is an amenable number.

19623648 is an abundant number, since it is smaller than the sum of its proper divisors (36574368).

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

19623648 is a wasteful number, since it uses less digits than its factorization.

19623648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18607 (or 18599 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 19623648 is about 4429.8586884911. The cubic root of 19623648 is about 269.7283413046.

The spelling of 19623648 in words is "nineteen million, six hundred twenty-three thousand, six hundred forty-eight".