19868930 has 8 divisors (see below), whose sum is σ = 35764092. Its totient is φ = 7947568.

The previous prime is 19868897. The next prime is 19868939. The reversal of 19868930 is 3986891.

It can be written as a sum of positive squares in 2 ways, for example, as 18983449 + 885481 = 4357^2 + 941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19868939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993437 + ... + 993456.

Almost surely, 2^19868930 is an apocalyptic number.

19868930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19868930 is a deficient number, since it is larger than the sum of its proper divisors (15895162).

19868930 is a wasteful number, since it uses less digits than its factorization.

19868930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986900.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 19868930 is about 4457.4577956499. The cubic root of 19868930 is about 270.8474970633.

The spelling of 19868930 in words is "nineteen million, eight hundred sixty-eight thousand, nine hundred thirty".