19660898 has 12 divisors (see below), whose sum is σ = 30545970. Its totient is φ = 9490656.

The previous prime is 19660889. The next prime is 19660903. The reversal of 19660898 is 89806691.

It can be written as a sum of positive squares in 3 ways, for example, as 19651489 + 9409 = 4433^2 + 97^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4163 + ... + 7526.

Almost surely, 2^19660898 is an apocalyptic number.

19660898 is a deficient number, since it is larger than the sum of its proper divisors (10885072).

19660898 is a wasteful number, since it uses less digits than its factorization.

19660898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11749 (or 11720 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 19660898 is about 4434.0611182076. The cubic root of 19660898 is about 269.8989013355.

The spelling of 19660898 in words is "nineteen million, six hundred sixty thousand, eight hundred ninety-eight".