19690950 has 48 divisors (see below), whose sum is σ = 49121856. Its totient is φ = 5220000.

The previous prime is 19690943. The next prime is 19690961. The reversal of 19690950 is 5909691.

19690950 is a nontrivial binomial coefficient, being equal to C(6276, 2).

It is a junction number, because it is equal to n+sod(n) for n = 19690899 and 19690908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37389 + ... + 37911.

It is an arithmetic number, because the mean of its divisors is an integer number (1023372).

Almost surely, 2^19690950 is an apocalyptic number.

19690950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19690950 is the 6275-th triangular number and also the 3138-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19690950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24560928).

19690950 is an abundant number, since it is smaller than the sum of its proper divisors (29430906).

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

19690950 is a wasteful number, since it uses less digits than its factorization.

19690950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 19690950 is about 4437.4485912515. The cubic root of 19690950 is about 270.0363462730.

The spelling of 19690950 in words is "nineteen million, six hundred ninety thousand, nine hundred fifty".