19318642 has 24 divisors (see below), whose sum is σ = 34801920. Its totient is φ = 8011080.

The previous prime is 19318633. The next prime is 19318657. The reversal of 19318642 is 24681391.

It is a junction number, because it is equal to n+sod(n) for n = 19318598 and 19318607.

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 11 ways as a sum of consecutive naturals, for example, 142 + ... + 6217.

It is an arithmetic number, because the mean of its divisors is an integer number (1450080).

Almost surely, 2^19318642 is an apocalyptic number.

19318642 is a deficient number, since it is larger than the sum of its proper divisors (15483278).

19318642 is a wasteful number, since it uses less digits than its factorization.

19318642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406 (or 6399 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 19318642 is about 4395.2977146036. The cubic root of 19318642 is about 268.3235955298.

The spelling of 19318642 in words is "nineteen million, three hundred eighteen thousand, six hundred forty-two".