19669914 has 48 divisors (see below), whose sum is σ = 47646144. Its totient is φ = 5812800.

The previous prime is 19669913. The next prime is 19669931. The reversal of 19669914 is 41996691.

19669914 is nontrivially palindromic in base 12.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19669914.

It is not an unprimeable number, because it can be changed into a prime (19669913) 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 23 ways as a sum of consecutive naturals, for example, 6907 + ... + 9329.

It is an arithmetic number, because the mean of its divisors is an integer number (992628).

Almost surely, 2^19669914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19669914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23823072).

19669914 is an abundant number, since it is smaller than the sum of its proper divisors (27976230).

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

19669914 is a wasteful number, since it uses less digits than its factorization.

19669914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483 (or 2480 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 19669914 is about 4435.0776768846. The cubic root of 19669914 is about 269.9401513439.

The spelling of 19669914 in words is "nineteen million, six hundred sixty-nine thousand, nine hundred fourteen".