19449699312 has 40 divisors (see below), whose sum is σ = 50252605056. Its totient is φ = 6482259136.

The previous prime is 19449699299. The next prime is 19449699319. The reversal of 19449699312 is 21399694491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19449699319) 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, 338503 + ... + 391769.

Almost surely, 2^19449699312 is an apocalyptic number.

19449699312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19449699312 is an abundant number, since it is smaller than the sum of its proper divisors (30802905744).

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

19449699312 is a wasteful number, since it uses less digits than its factorization.

19449699312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60885 (or 60879 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 57.

The spelling of 19449699312 in words is "nineteen billion, four hundred forty-nine million, six hundred ninety-nine thousand, three hundred twelve".