19669136 has 20 divisors (see below), whose sum is σ = 40351212. Its totient is φ = 9255936.

The previous prime is 19669129. The next prime is 19669141. The reversal of 19669136 is 63196691.

It can be written as a sum of positive squares in 2 ways, for example, as 17172736 + 2496400 = 4144^2 + 1580^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19669093 and 19669102.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 35885 + ... + 36428.

Almost surely, 2^19669136 is an apocalyptic number.

19669136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19669136 is an abundant number, since it is smaller than the sum of its proper divisors (20682076).

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

19669136 is a wasteful number, since it uses less digits than its factorization.

19669136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72338 (or 72332 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 19669136 is about 4434.9899661668. The cubic root of 19669136 is about 269.9365923348.

The spelling of 19669136 in words is "nineteen million, six hundred sixty-nine thousand, one hundred thirty-six".