19662238208 has 30 divisors (see below), whose sum is σ = 39292414161. Its totient is φ = 9829532672.

The previous prime is 19662238207. The next prime is 19662238223. The reversal of 19662238208 is 80283226691.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 19434590464 + 227647744 = 139408^2 + 15088^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99152.

It is a super-2 number, since 2×19662238208² (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 (19662238207) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3169766 + ... + 3175962.

Almost surely, 2^19662238208 is an apocalyptic number.

It is an amenable number.

19662238208 is a deficient number, since it is larger than the sum of its proper divisors (19630175953).

19662238208 is an frugal number, since it uses more digits than its factorization.

19662238208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12412 (or 6199 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 19662238208 in words is "nineteen billion, six hundred sixty-two million, two hundred thirty-eight thousand, two hundred eight".