19814845 has 16 divisors (see below), whose sum is σ = 25287552. Its totient is φ = 14872000.

The previous prime is 19814833. The next prime is 19814863. The reversal of 19814845 is 54841891.

It is not a de Polignac number, because 19814845 - 2¹³ = 19806653 is a prime.

It is a super-3 number, since 3×19814845³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19814798 and 19814807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4470 + ... + 7720.

It is an arithmetic number, because the mean of its divisors is an integer number (1580472).

Almost surely, 2^19814845 is an apocalyptic number.

It is an amenable number.

19814845 is a deficient number, since it is larger than the sum of its proper divisors (5472707).

19814845 is a wasteful number, since it uses less digits than its factorization.

19814845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332.

The product of its digits is 46080, while the sum is 40.

The square root of 19814845 is about 4451.3868625407. The cubic root of 19814845 is about 270.6015167181.

The spelling of 19814845 in words is "nineteen million, eight hundred fourteen thousand, eight hundred forty-five".