19803045 has 16 divisors (see below), whose sum is σ = 33549120. Its totient is φ = 9940224.

The previous prime is 19803037. The next prime is 19803067. The reversal of 19803045 is 54030891.

It is not a de Polignac number, because 19803045 - 2³ = 19803037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38575 + ... + 39084.

It is an arithmetic number, because the mean of its divisors is an integer number (2096820).

Almost surely, 2^19803045 is an apocalyptic number.

19803045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19803045 is a deficient number, since it is larger than the sum of its proper divisors (13746075).

19803045 is a wasteful number, since it uses less digits than its factorization.

19803045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77684.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 19803045 is about 4450.0612355337. The cubic root of 19803045 is about 270.5477904680.

The spelling of 19803045 in words is "nineteen million, eight hundred three thousand, forty-five".