19112912 has 40 divisors (see below), whose sum is σ = 45580416. Its totient is φ = 7560576.

The previous prime is 19112911. The next prime is 19112921. The reversal of 19112912 is 21921191.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19112911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5108 + ... + 8019.

Almost surely, 2^19112912 is an apocalyptic number.

It is an amenable number.

19112912 is an abundant number, since it is smaller than the sum of its proper divisors (26467504).

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

19112912 is a wasteful number, since it uses less digits than its factorization.

19112912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13155 (or 13149 counting only the distinct ones).

The product of its digits is 324, while the sum is 26.

The square root of 19112912 is about 4371.8316527515. The cubic root of 19112912 is about 267.3677081907.

The spelling of 19112912 in words is "nineteen million, one hundred twelve thousand, nine hundred twelve".