19808970 has 16 divisors (see below), whose sum is σ = 47541600. Its totient is φ = 5282384.

The previous prime is 19808959. The next prime is 19808977. The reversal of 19808970 is 7980891.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (19808977) 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 7 ways as a sum of consecutive naturals, for example, 330120 + ... + 330179.

It is an arithmetic number, because the mean of its divisors is an integer number (2971350).

Almost surely, 2^19808970 is an apocalyptic number.

19808970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19808970 is an abundant number, since it is smaller than the sum of its proper divisors (27732630).

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

19808970 is a wasteful number, since it uses less digits than its factorization.

19808970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660309.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 19808970 is about 4450.7269069221. The cubic root of 19808970 is about 270.5747700868.

The spelling of 19808970 in words is "nineteen million, eight hundred eight thousand, nine hundred seventy".