20486517 has 8 divisors (see below), whose sum is σ = 27661440. Its totient is φ = 13484640.

The previous prime is 20486509. The next prime is 20486519. The reversal of 20486517 is 71568402.

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

It is not a de Polignac number, because 20486517 - 2³ = 20486509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20486519) 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 in 7 ways as a sum of consecutive naturals, for example, 42984 + ... + 43457.

It is an arithmetic number, because the mean of its divisors is an integer number (3457680).

Almost surely, 2^20486517 is an apocalyptic number.

It is an amenable number.

20486517 is a deficient number, since it is larger than the sum of its proper divisors (7174923).

20486517 is an equidigital number, since it uses as much as digits as its factorization.

20486517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86523.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 20486517 is about 4526.2033758991. The cubic root of 20486517 is about 273.6251689980.

The spelling of 20486517 in words is "twenty million, four hundred eighty-six thousand, five hundred seventeen".