19189950 has 72 divisors (see below), whose sum is σ = 51601608. Its totient is φ = 4717440.

The previous prime is 19189949. The next prime is 19189979. The reversal of 19189950 is 5998191.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24972 + ... + 25728.

It is an arithmetic number, because the mean of its divisors is an integer number (716689).

Almost surely, 2^19189950 is an apocalyptic number.

19189950 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 19189950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25800804).

19189950 is an abundant number, since it is smaller than the sum of its proper divisors (32411658).

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

19189950 is a wasteful number, since it uses less digits than its factorization.

19189950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 19189950 is about 4380.6335158285. The cubic root of 19189950 is about 267.7264510374.

The spelling of 19189950 in words is "nineteen million, one hundred eighty-nine thousand, nine hundred fifty".