19894442 has 8 divisors (see below), whose sum is σ = 30476736. Its totient is φ = 9735532.

The previous prime is 19894421. The next prime is 19894447. The reversal of 19894442 is 24449891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19894442.

It is not an unprimeable number, because it can be changed into a prime (19894447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105728 + ... + 105915.

It is an arithmetic number, because the mean of its divisors is an integer number (3809592).

Almost surely, 2^19894442 is an apocalyptic number.

19894442 is a deficient number, since it is larger than the sum of its proper divisors (10582294).

19894442 is a wasteful number, since it uses less digits than its factorization.

19894442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211692.

The product of its digits is 82944, while the sum is 41.

The square root of 19894442 is about 4460.3185984860. The cubic root of 19894442 is about 270.9633715467.

The spelling of 19894442 in words is "nineteen million, eight hundred ninety-four thousand, four hundred forty-two".