19864848 has 40 divisors (see below), whose sum is σ = 51478848. Its totient is φ = 6600832.

The previous prime is 19864837. The next prime is 19864903. The reversal of 19864848 is 84846891.

It is a Cunningham number, because it is equal to 4457²-1.

It is a super-2 number, since 2×19864848² = 789224372126208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 19864797 and 19864806.

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 7 ways as a sum of consecutive naturals, for example, 26365 + ... + 27107.

Almost surely, 2^19864848 is an apocalyptic number.

It is an amenable number.

19864848 is an abundant number, since it is smaller than the sum of its proper divisors (31614000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19864848 is a wasteful number, since it uses less digits than its factorization.

19864848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1305 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 19864848 is about 4456.9998878169. Note that the first 3 decimals coincide. The cubic root of 19864848 is about 270.8289475792.

The spelling of 19864848 in words is "nineteen million, eight hundred sixty-four thousand, eight hundred forty-eight".