19640112 has 80 divisors (see below), whose sum is σ = 53425152. Its totient is φ = 6209280.

The previous prime is 19640099. The next prime is 19640113. The reversal of 19640112 is 21104691.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (19640113) 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 15 ways as a sum of consecutive naturals, for example, 99598 + ... + 99794.

Almost surely, 2^19640112 is an apocalyptic number.

19640112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19640112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26712576).

19640112 is an abundant number, since it is smaller than the sum of its proper divisors (33785040).

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

19640112 is a wasteful number, since it uses less digits than its factorization.

19640112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 19640112 is about 4431.7165974372. The cubic root of 19640112 is about 269.8037531420.

The spelling of 19640112 in words is "nineteen million, six hundred forty thousand, one hundred twelve".