19969136 has 40 divisors (see below), whose sum is σ = 42747264. Its totient is φ = 8960960.

The previous prime is 19969123. The next prime is 19969141. The reversal of 19969136 is 63196991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13925 + ... + 15291.

Almost surely, 2^19969136 is an apocalyptic number.

19969136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19969136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21373632).

19969136 is an abundant number, since it is smaller than the sum of its proper divisors (22778128).

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

19969136 is a wasteful number, since it uses less digits than its factorization.

19969136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1463 counting only the distinct ones).

The product of its digits is 78732, while the sum is 44.

The square root of 19969136 is about 4468.6839225884. The cubic root of 19969136 is about 271.3020601302.

The spelling of 19969136 in words is "nineteen million, nine hundred sixty-nine thousand, one hundred thirty-six".