19198081 has 8 divisors (see below), whose sum is σ = 22451264. Its totient is φ = 16072560.

The previous prime is 19198073. The next prime is 19198097. The reversal of 19198081 is 18089191.

It is a happy number.

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

It is not a de Polignac number, because 19198081 - 2³ = 19198073 is a prime.

It is a super-2 number, since 2×19198081² = 737132628165122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19198081.

It is not an unprimeable number, because it can be changed into a prime (19198681) 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, 31590 + ... + 32191.

It is an arithmetic number, because the mean of its divisors is an integer number (2806408).

Almost surely, 2^19198081 is an apocalyptic number.

It is an amenable number.

19198081 is a deficient number, since it is larger than the sum of its proper divisors (3253183).

19198081 is an equidigital number, since it uses as much as digits as its factorization.

19198081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63831.

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 19198081 is about 4381.5614796554. The cubic root of 19198081 is about 267.7642586118.

It can be divided in two parts, 1919 and 8081, that added together give a 4-th power (10000 = 10⁴).

The spelling of 19198081 in words is "nineteen million, one hundred ninety-eight thousand, eighty-one".