19804230 has 64 divisors (see below), whose sum is σ = 54129600. Its totient is φ = 5149440.

The previous prime is 19804223. The next prime is 19804231. The reversal of 19804230 is 3240891.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 19804194 and 19804203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19804231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10176 + ... + 11964.

It is an arithmetic number, because the mean of its divisors is an integer number (845775).

Almost surely, 2^19804230 is an apocalyptic number.

19804230 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 19804230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27064800).

19804230 is an abundant number, since it is smaller than the sum of its proper divisors (34325370).

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

19804230 is a wasteful number, since it uses less digits than its factorization.

19804230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 19804230 is about 4450.1943777772. The cubic root of 19804230 is about 270.5531868223.

The spelling of 19804230 in words is "nineteen million, eight hundred four thousand, two hundred thirty".