19730872 has 32 divisors (see below), whose sum is σ = 44121600. Its totient is φ = 8087904.

The previous prime is 19730857. The next prime is 19730891. The reversal of 19730872 is 27803791.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6372 + ... + 8947.

It is an arithmetic number, because the mean of its divisors is an integer number (1378800).

Almost surely, 2^19730872 is an apocalyptic number.

It is an amenable number.

19730872 is an abundant number, since it is smaller than the sum of its proper divisors (24390728).

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

19730872 is a wasteful number, since it uses less digits than its factorization.

19730872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15355 (or 15351 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 19730872 is about 4441.9446191955. The cubic root of 19730872 is about 270.2187162402.

It can be divided in two parts, 19730 and 872, that added together give a palindrome (20602).

The spelling of 19730872 in words is "nineteen million, seven hundred thirty thousand, eight hundred seventy-two".