20016838 has 4 divisors (see below), whose sum is σ = 30025260. Its totient is φ = 10008418.

The previous prime is 20016833. The next prime is 20016839. The reversal of 20016838 is 83861002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83861002 = 2 ⋅41930501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016833) by changing a digit.

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 as a sum of consecutive naturals, namely, 5004208 + ... + 5004211.

It is an arithmetic number, because the mean of its divisors is an integer number (7506315).

Almost surely, 2^20016838 is an apocalyptic number.

20016838 is a deficient number, since it is larger than the sum of its proper divisors (10008422).

20016838 is a wasteful number, since it uses less digits than its factorization.

20016838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008421.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20016838 is about 4474.0181045677. The cubic root of 20016838 is about 271.5179158984.

The spelling of 20016838 in words is "twenty million, sixteen thousand, eight hundred thirty-eight".