19669912 has 24 divisors (see below), whose sum is σ = 37435860. Its totient is φ = 9688640.

The previous prime is 19669907. The next prime is 19669913. The reversal of 19669912 is 21996691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19669913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143508 + ... + 143644.

Almost surely, 2^19669912 is an apocalyptic number.

It is an amenable number.

19669912 is a deficient number, since it is larger than the sum of its proper divisors (17765948).

19669912 is a wasteful number, since it uses less digits than its factorization.

19669912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 270 counting only the distinct ones).

The product of its digits is 52488, while the sum is 43.

The square root of 19669912 is about 4435.0774514094. The cubic root of 19669912 is about 269.9401421949.

The spelling of 19669912 in words is "nineteen million, six hundred sixty-nine thousand, nine hundred twelve".