19389912 has 32 divisors (see below), whose sum is σ = 48980400. Its totient is φ = 6395904.

The previous prime is 19389907. The next prime is 19389913. The reversal of 19389912 is 21998391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19389913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837 + ... + 6492.

Almost surely, 2^19389912 is an apocalyptic number.

19389912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19389912 is an abundant number, since it is smaller than the sum of its proper divisors (29590488).

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

19389912 is a wasteful number, since it uses less digits than its factorization.

19389912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8435 (or 8431 counting only the distinct ones).

The product of its digits is 34992, while the sum is 42.

The square root of 19389912 is about 4403.3977789884. The cubic root of 19389912 is about 268.6531555154.

It can be divided in two parts, 19389 and 912, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 19389912 in words is "nineteen million, three hundred eighty-nine thousand, nine hundred twelve".