19896738 has 16 divisors (see below), whose sum is σ = 40081440. Its totient is φ = 6584256.

The previous prime is 19896707. The next prime is 19896809. The reversal of 19896738 is 83769891.

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, 11095 + ... + 12762.

It is an arithmetic number, because the mean of its divisors is an integer number (2505090).

Almost surely, 2^19896738 is an apocalyptic number.

19896738 is an abundant number, since it is smaller than the sum of its proper divisors (20184702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19896738 is a wasteful number, since it uses less digits than its factorization.

19896738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24001.

The product of its digits is 653184, while the sum is 51.

The square root of 19896738 is about 4460.5759717776. The cubic root of 19896738 is about 270.9737950270.

The spelling of 19896738 in words is "nineteen million, eight hundred ninety-six thousand, seven hundred thirty-eight".