19953472 has 56 divisors (see below), whose sum is σ = 49377600. Its totient is φ = 7772160.

The previous prime is 19953407. The next prime is 19953497. The reversal of 19953472 is 27435991.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2904 + ... + 6952.

Almost surely, 2^19953472 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 19953472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24688800).

19953472 is an abundant number, since it is smaller than the sum of its proper divisors (29424128).

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

19953472 is a wasteful number, since it uses less digits than its factorization.

19953472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079 (or 4069 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 19953472 is about 4466.9309374558. The cubic root of 19953472 is about 271.2311041790.

The spelling of 19953472 in words is "nineteen million, nine hundred fifty-three thousand, four hundred seventy-two".