19699712 has 24 divisors (see below), whose sum is σ = 39393900. Its totient is φ = 9848832.

The previous prime is 19699711. The next prime is 19699727. The reversal of 19699712 is 21799691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19699711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2762 + ... + 6857.

Almost surely, 2^19699712 is an apocalyptic number.

It is an amenable number.

19699712 is a deficient number, since it is larger than the sum of its proper divisors (19694188).

19699712 is an frugal number, since it uses more digits than its factorization.

19699712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9641 (or 9621 counting only the distinct ones).

The product of its digits is 61236, while the sum is 44.

The square root of 19699712 is about 4438.4357604904. The cubic root of 19699712 is about 270.0763935638.

The spelling of 19699712 in words is "nineteen million, six hundred ninety-nine thousand, seven hundred twelve".