19813112 has 16 divisors (see below), whose sum is σ = 40527000. Its totient is φ = 9005920.

The previous prime is 19813103. The next prime is 19813117. The reversal of 19813112 is 21131891.

It is a super-3 number, since 3×19813112³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19813117) 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 3 ways as a sum of consecutive naturals, for example, 112487 + ... + 112662.

Almost surely, 2^19813112 is an apocalyptic number.

It is an amenable number.

19813112 is an abundant number, since it is smaller than the sum of its proper divisors (20713888).

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

19813112 is a wasteful number, since it uses less digits than its factorization.

19813112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225166 (or 225162 counting only the distinct ones).

The product of its digits is 432, while the sum is 26.

The square root of 19813112 is about 4451.1921998494. The cubic root of 19813112 is about 270.5936275807.

The spelling of 19813112 in words is "nineteen million, eight hundred thirteen thousand, one hundred twelve".