20710487 has 12 divisors (see below), whose sum is σ = 24435216. Its totient is φ = 17498880.

The previous prime is 20710483. The next prime is 20710499. The reversal of 20710487 is 78401702.

It is not a de Polignac number, because 20710487 - 2² = 20710483 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 (20710483) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 503 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (2036268).

Almost surely, 2^20710487 is an apocalyptic number.

20710487 is a deficient number, since it is larger than the sum of its proper divisors (3724729).

20710487 is an equidigital number, since it uses as much as digits as its factorization.

20710487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6038 (or 6031 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 20710487 is about 4550.8776076709. The cubic root of 20710487 is about 274.6186979953.

The spelling of 20710487 in words is "twenty million, seven hundred ten thousand, four hundred eighty-seven".