19021950 has 72 divisors (see below), whose sum is σ = 52402896. Its totient is φ = 4944000.

The previous prime is 19021939. The next prime is 19021967. The reversal of 19021950 is 5912091.

It is a happy number.

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, 17935 + ... + 18965.

It is an arithmetic number, because the mean of its divisors is an integer number (727818).

Almost surely, 2^19021950 is an apocalyptic number.

19021950 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 19021950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26201448).

19021950 is an abundant number, since it is smaller than the sum of its proper divisors (33380946).

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

19021950 is a wasteful number, since it uses less digits than its factorization.

19021950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 19021950 is about 4361.4160544484. The cubic root of 19021950 is about 266.9428821977.

The spelling of 19021950 in words is "nineteen million, twenty-one thousand, nine hundred fifty".