19898648011 has 8 divisors (see below), whose sum is σ = 21910492224. Its totient is φ = 17920616520.

The previous prime is 19898647981. The next prime is 19898648023. The reversal of 19898648011 is 11084689891.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19898648011 - 2²¹ = 19896550859 is a prime.

It is a super-2 number, since 2×19898648011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19898648071) 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, 8451945 + ... + 8454298.

It is an arithmetic number, because the mean of its divisors is an integer number (2738811528).

Almost surely, 2^19898648011 is an apocalyptic number.

19898648011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19898648011 is a deficient number, since it is larger than the sum of its proper divisors (2011844213).

19898648011 is a wasteful number, since it uses less digits than its factorization.

19898648011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16906361.

The product of its (nonzero) digits is 995328, while the sum is 55.

The spelling of 19898648011 in words is "nineteen billion, eight hundred ninety-eight million, six hundred forty-eight thousand, eleven".