19868630 has 16 divisors (see below), whose sum is σ = 36730800. Its totient is φ = 7732512.

The previous prime is 19868621. The next prime is 19868633. The reversal of 19868630 is 3686891.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19868633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26480 + ... + 27219.

It is an arithmetic number, because the mean of its divisors is an integer number (2295675).

Almost surely, 2^19868630 is an apocalyptic number.

19868630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19868630 is a deficient number, since it is larger than the sum of its proper divisors (16862170).

19868630 is a wasteful number, since it uses less digits than its factorization.

19868630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53743.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 19868630 is about 4457.4241440545. The cubic root of 19868630 is about 270.8461338855.

The spelling of 19868630 in words is "nineteen million, eight hundred sixty-eight thousand, six hundred thirty".