19873742 has 16 divisors (see below), whose sum is σ = 34128000. Its totient is φ = 8502648.

The previous prime is 19873727. The next prime is 19873751. The reversal of 19873742 is 24737891.

It is a self number, because there is not a number n which added to its sum of digits gives 19873742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12509 + ... + 14007.

It is an arithmetic number, because the mean of its divisors is an integer number (2133000).

Almost surely, 2^19873742 is an apocalyptic number.

19873742 is a deficient number, since it is larger than the sum of its proper divisors (14254258).

19873742 is a wasteful number, since it uses less digits than its factorization.

19873742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

The product of its digits is 84672, while the sum is 41.

The square root of 19873742 is about 4457.9975325251. The cubic root of 19873742 is about 270.8693605617.

The spelling of 19873742 in words is "nineteen million, eight hundred seventy-three thousand, seven hundred forty-two".