19516950 has 120 divisors (see below), whose sum is σ = 55814880. Its totient is φ = 5054400.

The previous prime is 19516927. The next prime is 19516957. The reversal of 19516950 is 5961591.

It is a super-2 number, since 2×19516950² = 761822674605000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19516957) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 247011 + ... + 247089.

It is an arithmetic number, because the mean of its divisors is an integer number (465124).

Almost surely, 2^19516950 is an apocalyptic number.

19516950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19516950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27907440).

19516950 is an abundant number, since it is smaller than the sum of its proper divisors (36297930).

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

19516950 is a wasteful number, since it uses less digits than its factorization.

19516950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 19516950 is about 4417.7992258590. The cubic root of 19516950 is about 269.2385955862.

The spelling of 19516950 in words is "nineteen million, five hundred sixteen thousand, nine hundred fifty".