20138716 has 36 divisors (see below), whose sum is σ = 39434304. Its totient is φ = 8994960.

The previous prime is 20138707. The next prime is 20138743. The reversal of 20138716 is 61783102.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a congruent number.

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, 649621 + ... + 649651.

Almost surely, 2^20138716 is an apocalyptic number.

20138716 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20138716 is a deficient number, since it is larger than the sum of its proper divisors (19295588).

20138716 is an equidigital number, since it uses as much as digits as its factorization.

20138716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 20138716 is about 4487.6180764410. The cubic root of 20138716 is about 272.0678716152.

The spelling of 20138716 in words is "twenty million, one hundred thirty-eight thousand, seven hundred sixteen".