19621248 has 64 divisors (see below), whose sum is σ = 53566320. Its totient is φ = 6359040.

The previous prime is 19621241. The next prime is 19621249. The reversal of 19621248 is 84212691.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13518 + ... + 14898.

Almost surely, 2^19621248 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 19621248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26783160).

19621248 is an abundant number, since it is smaller than the sum of its proper divisors (33945072).

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

19621248 is a wasteful number, since it uses less digits than its factorization.

19621248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1423 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 19621248 is about 4429.5877912059. The cubic root of 19621248 is about 269.7173448033.

The spelling of 19621248 in words is "nineteen million, six hundred twenty-one thousand, two hundred forty-eight".