19913488 has 40 divisors (see below), whose sum is σ = 45622080. Its totient is φ = 8238720.

The previous prime is 19913471. The next prime is 19913497. The reversal of 19913488 is 88431991.

It is a super-2 number, since 2×19913488² = 793094008652288, which contains 22 as substring.

It is an unprimeable number.

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, 183 + ... + 6313.

It is an arithmetic number, because the mean of its divisors is an integer number (1140552).

Almost surely, 2^19913488 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 19913488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22811040).

19913488 is an abundant number, since it is smaller than the sum of its proper divisors (25708592).

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

19913488 is a wasteful number, since it uses less digits than its factorization.

19913488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6175 (or 6169 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 19913488 is about 4462.4531370088. The cubic root of 19913488 is about 271.0498131495.

The spelling of 19913488 in words is "nineteen million, nine hundred thirteen thousand, four hundred eighty-eight".