20487061 has 8 divisors (see below), whose sum is σ = 23482944. Its totient is φ = 17508480.

The previous prime is 20487029. The next prime is 20487067. The reversal of 20487061 is 16078402.

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

It is a cyclic number.

It is not a de Polignac number, because 20487061 - 2⁵ = 20487029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487067) 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, 1675 + ... + 6616.

It is an arithmetic number, because the mean of its divisors is an integer number (2935368).

Almost surely, 2^20487061 is an apocalyptic number.

It is an amenable number.

20487061 is a deficient number, since it is larger than the sum of its proper divisors (2995883).

20487061 is an equidigital number, since it uses as much as digits as its factorization.

20487061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20487061 is about 4526.2634700159. The cubic root of 20487061 is about 273.6275909287.

The spelling of 20487061 in words is "twenty million, four hundred eighty-seven thousand, sixty-one".