20457716 has 12 divisors (see below), whose sum is σ = 35972160. Its totient is φ = 10179960.

The previous prime is 20457709. The next prime is 20457733. The reversal of 20457716 is 61775402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11276 + ... + 12963.

It is an arithmetic number, because the mean of its divisors is an integer number (2997680).

Almost surely, 2^20457716 is an apocalyptic number.

It is an amenable number.

20457716 is a deficient number, since it is larger than the sum of its proper divisors (15514444).

20457716 is a wasteful number, since it uses less digits than its factorization.

20457716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24454 (or 24452 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20457716 is about 4523.0206720730. The cubic root of 20457716 is about 273.4968834138.

The spelling of 20457716 in words is "twenty million, four hundred fifty-seven thousand, seven hundred sixteen".