19690842 has 16 divisors (see below), whose sum is σ = 39693312. Its totient is φ = 6511680.

The previous prime is 19690841. The next prime is 19690843. The reversal of 19690842 is 24809691.

It is an interprime number because it is at equal distance from previous prime (19690841) and next prime (19690843).

It is a self number, because there is not a number n which added to its sum of digits gives 19690842.

It is not an unprimeable number, because it can be changed into a prime (19690841) 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 7 ways as a sum of consecutive naturals, for example, 12159 + ... + 13682.

It is an arithmetic number, because the mean of its divisors is an integer number (2480832).

Almost surely, 2^19690842 is an apocalyptic number.

19690842 is an abundant number, since it is smaller than the sum of its proper divisors (20002470).

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

19690842 is a wasteful number, since it uses less digits than its factorization.

19690842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25973.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 19690842 is about 4437.4364220798. The cubic root of 19690842 is about 270.0358525778.

The spelling of 19690842 in words is "nineteen million, six hundred ninety thousand, eight hundred forty-two".