19679900 has 18 divisors (see below), whose sum is σ = 42705600. Its totient is φ = 7871920.

The previous prime is 19679861. The next prime is 19679903. The reversal of 19679900 is 997691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19679903) 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 5 ways as a sum of consecutive naturals, for example, 98300 + ... + 98499.

Almost surely, 2^19679900 is an apocalyptic number.

19679900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19679900 is an abundant number, since it is smaller than the sum of its proper divisors (23025700).

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

19679900 is a wasteful number, since it uses less digits than its factorization.

19679900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196813 (or 196806 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 19679900 is about 4436.2033316790. The cubic root of 19679900 is about 269.9858245873.

The spelling of 19679900 in words is "nineteen million, six hundred seventy-nine thousand, nine hundred".