19487642 has 16 divisors (see below), whose sum is σ = 29893632. Its totient is φ = 9525600.

The previous prime is 19487639. The next prime is 19487683. The reversal of 19487642 is 24678491.

It is a self number, because there is not a number n which added to its sum of digits gives 19487642.

It is an unprimeable number.

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, 18017 + ... + 19067.

It is an arithmetic number, because the mean of its divisors is an integer number (1868352).

Almost surely, 2^19487642 is an apocalyptic number.

19487642 is a deficient number, since it is larger than the sum of its proper divisors (10405990).

19487642 is a wasteful number, since it uses less digits than its factorization.

19487642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its digits is 96768, while the sum is 41.

The square root of 19487642 is about 4414.4809434406. The cubic root of 19487642 is about 269.1037589806.

The spelling of 19487642 in words is "nineteen million, four hundred eighty-seven thousand, six hundred forty-two".