20587066 has 4 divisors (see below), whose sum is σ = 30880602. Its totient is φ = 10293532.

The previous prime is 20587037. The next prime is 20587079. The reversal of 20587066 is 66078502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20061441 + 525625 = 4479^2 + 725^2 .

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 as a sum of consecutive naturals, namely, 5146765 + ... + 5146768.

Almost surely, 2^20587066 is an apocalyptic number.

20587066 is a deficient number, since it is larger than the sum of its proper divisors (10293536).

20587066 is a wasteful number, since it uses less digits than its factorization.

20587066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10293535.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20587066 is about 4537.2972130994. The cubic root of 20587066 is about 274.0720946204.

The spelling of 20587066 in words is "twenty million, five hundred eighty-seven thousand, sixty-six".