19309914 has 80 divisors (see below), whose sum is σ = 47750472. Its totient is φ = 5795712.

The previous prime is 19309889. The next prime is 19309919. The reversal of 19309914 is 41990391.

It can be written as a sum of positive squares in 4 ways, for example, as 18275625 + 1034289 = 4275^2 + 1017^2 .

It is not an unprimeable number, because it can be changed into a prime (19309919) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 111532 + ... + 111704.

Almost surely, 2^19309914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19309914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23875236).

19309914 is an abundant number, since it is smaller than the sum of its proper divisors (28440558).

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

19309914 is a wasteful number, since it uses less digits than its factorization.

19309914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 19309914 is about 4394.3047231616. The cubic root of 19309914 is about 268.2831806615.

The spelling of 19309914 in words is "nineteen million, three hundred nine thousand, nine hundred fourteen".