19000530 has 96 divisors (see below), whose sum is σ = 52700544. Its totient is φ = 4739328.

The previous prime is 19000519. The next prime is 19000559. The reversal of 19000530 is 3500091.

19000530 is a nontrivial binomial coefficient, being equal to C(6165, 2).

It is a super-2 number, since 2×19000530² = 722040280561800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138622 + ... + 138758.

It is an arithmetic number, because the mean of its divisors is an integer number (548964).

Almost surely, 2^19000530 is an apocalyptic number.

19000530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19000530 is the 6164-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19000530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26350272).

19000530 is an abundant number, since it is smaller than the sum of its proper divisors (33700014).

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

19000530 is a wasteful number, since it uses less digits than its factorization.

19000530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 19000530 is about 4358.9597382862. The cubic root of 19000530 is about 266.8426459945.

The spelling of 19000530 in words is "nineteen million, five hundred thirty", and thus it is an aban number.