19690045 has 16 divisors (see below), whose sum is σ = 24413760. Its totient is φ = 15235200.

The previous prime is 19690037. The next prime is 19690049. The reversal of 19690045 is 54009691.

It is not a de Polignac number, because 19690045 - 2³ = 19690037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19690049) by changing a digit.

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, 28150 + ... + 28840.

It is an arithmetic number, because the mean of its divisors is an integer number (1525860).

Almost surely, 2^19690045 is an apocalyptic number.

It is an amenable number.

19690045 is a deficient number, since it is larger than the sum of its proper divisors (4723715).

19690045 is a wasteful number, since it uses less digits than its factorization.

19690045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 19690045 is about 4437.3466170675. The cubic root of 19690045 is about 270.0322092348.

The spelling of 19690045 in words is "nineteen million, six hundred ninety thousand, forty-five".