19898672 has 30 divisors (see below), whose sum is σ = 39461388. Its totient is φ = 9720352.

The previous prime is 19898663. The next prime is 19898689. The reversal of 19898672 is 27689891.

It is a self number, because there is not a number n which added to its sum of digits gives 19898672.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 35063 + ... + 35625.

Almost surely, 2^19898672 is an apocalyptic number.

It is an amenable number.

19898672 is a deficient number, since it is larger than the sum of its proper divisors (19562716).

19898672 is an equidigital number, since it uses as much as digits as its factorization.

19898672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 612 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 19898672 is about 4460.7927546570. The cubic root of 19898672 is about 270.9825744618.

The spelling of 19898672 in words is "nineteen million, eight hundred ninety-eight thousand, six hundred seventy-two".