20487056 has 20 divisors (see below), whose sum is σ = 40174512. Its totient is φ = 10119456.

The previous prime is 20487029. The next prime is 20487067. The reversal of 20487056 is 65078402.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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, 6386 + ... + 9041.

Almost surely, 2^20487056 is an apocalyptic number.

It is an amenable number.

20487056 is a deficient number, since it is larger than the sum of its proper divisors (19687456).

20487056 is a wasteful number, since it uses less digits than its factorization.

20487056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15518 (or 15512 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20487056 is about 4526.2629176839. The cubic root of 20487056 is about 273.6275686685.

The spelling of 20487056 in words is "twenty million, four hundred eighty-seven thousand, fifty-six".