19705230 has 24 divisors (see below), whose sum is σ = 51233832. Its totient is φ = 5254704.

The previous prime is 19705187. The next prime is 19705291. The reversal of 19705230 is 3250791.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19705194 and 19705203.

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 11 ways as a sum of consecutive naturals, for example, 109384 + ... + 109563.

It is an arithmetic number, because the mean of its divisors is an integer number (2134743).

Almost surely, 2^19705230 is an apocalyptic number.

19705230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19705230 is an abundant number, since it is smaller than the sum of its proper divisors (31528602).

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

19705230 is a wasteful number, since it uses less digits than its factorization.

19705230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218960 (or 218957 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 19705230 is about 4439.0573323624. The cubic root of 19705230 is about 270.1016078481.

The spelling of 19705230 in words is "nineteen million, seven hundred five thousand, two hundred thirty".