19690734 has 32 divisors (see below), whose sum is σ = 46227456. Its totient is φ = 5473440.

The previous prime is 19690733. The next prime is 19690751. The reversal of 19690734 is 43709691.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 19690692 and 19690701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19690733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4782 + ... + 7889.

It is an arithmetic number, because the mean of its divisors is an integer number (1444608).

Almost surely, 2^19690734 is an apocalyptic number.

19690734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19690734 is an abundant number, since it is smaller than the sum of its proper divisors (26536722).

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

19690734 is a wasteful number, since it uses less digits than its factorization.

19690734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 19690734 is about 4437.4242528746. The cubic root of 19690734 is about 270.0353588809.

The spelling of 19690734 in words is "nineteen million, six hundred ninety thousand, seven hundred thirty-four".