20486566 has 8 divisors (see below), whose sum is σ = 30964824. Its totient is φ = 10164960.

The previous prime is 20486563. The next prime is 20486573. The reversal of 20486566 is 66568402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20486563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38835 + ... + 39358.

It is an arithmetic number, because the mean of its divisors is an integer number (3870603).

Almost surely, 2^20486566 is an apocalyptic number.

20486566 is a deficient number, since it is larger than the sum of its proper divisors (10478258).

20486566 is a wasteful number, since it uses less digits than its factorization.

20486566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78326.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 20486566 is about 4526.2087888209. The cubic root of 20486566 is about 273.6253871516.

The spelling of 20486566 in words is "twenty million, four hundred eighty-six thousand, five hundred sixty-six".