19908045 has 64 divisors (see below), whose sum is σ = 37601280. Its totient is φ = 9979200.

The previous prime is 19908023. The next prime is 19908059. The reversal of 19908045 is 54080991.

It is not a de Polignac number, because 19908045 - 2⁶ = 19907981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 280360 + ... + 280430.

It is an arithmetic number, because the mean of its divisors is an integer number (587520).

Almost surely, 2^19908045 is an apocalyptic number.

19908045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19908045 is a deficient number, since it is larger than the sum of its proper divisors (17693235).

19908045 is a wasteful number, since it uses less digits than its factorization.

19908045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 19908045 is about 4461.8432289806. The cubic root of 19908045 is about 271.0251153405.

The spelling of 19908045 in words is "nineteen million, nine hundred eight thousand, forty-five".