19889136 has 60 divisors (see below), whose sum is σ = 56629560. Its totient is φ = 6514560.

The previous prime is 19889117. The next prime is 19889137. The reversal of 19889136 is 63198891.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 19889091 and 19889100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19889137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7326 + ... + 9666.

It is an arithmetic number, because the mean of its divisors is an integer number (943826).

Almost surely, 2^19889136 is an apocalyptic number.

19889136 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 19889136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28314780).

19889136 is an abundant number, since it is smaller than the sum of its proper divisors (36740424).

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

19889136 is a wasteful number, since it uses less digits than its factorization.

19889136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 2405 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 19889136 is about 4459.7237582613. The cubic root of 19889136 is about 270.9392800696.

The spelling of 19889136 in words is "nineteen million, eight hundred eighty-nine thousand, one hundred thirty-six".