19994738 has 8 divisors (see below), whose sum is σ = 30011520. Its totient is φ = 9990900.

The previous prime is 19994731. The next prime is 19994749. The reversal of 19994738 is 83749991.

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

It is not an unprimeable number, because it can be changed into a prime (19994731) 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, 3143 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (3751440).

Almost surely, 2^19994738 is an apocalyptic number.

19994738 is a deficient number, since it is larger than the sum of its proper divisors (10016782).

19994738 is a wasteful number, since it uses less digits than its factorization.

19994738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472.

The product of its digits is 489888, while the sum is 50.

The square root of 19994738 is about 4471.5476068136. The cubic root of 19994738 is about 271.4179541290.

The spelling of 19994738 in words is "nineteen million, nine hundred ninety-four thousand, seven hundred thirty-eight".